Pierre Kervella

Résumé - July 2009

Pierre Kervella


 - Since 2004: Astronome-Adjoint (Staff Astronomer), Observatoire de Paris (LESIA)

Astrophysics research topics: Observational astronomy applied to stellar physics

- Cepheids: Innovative application of diffferent observation techniques to the study of Cepheids: interferometry (VLTI), high resolution spectroscopy (HARPS), imaging,... Discovery in 2005 of circumstellar envelopes around four Cepheids (VLTI/VINCI, MIDI and CHARA/FLUOR). Study of the light echoes and distance measurement of RS Pup in 2007 (NTT/EMMI). VISIR observations of the envelopes around a sample of 12 nearby Cepheids in 2008 (work in progress).

- Main sequence stars: First combination of constraints from interferometry, photometry, asteroseismology, spectroscopy for the modeling of nearby dwarf and subgiant stars (alpha Cen, Procyon, Sirius,...). Interferometric study of the limb darkening of a Cen B (VLTI/VINCI). Micro-arcsec differential astrometry with NACO and high-resolution spectroscopy with HARPS of the multiple system d Velorum (work in progress).

- Fast-rotating stars: Measurement of the spectacular flattening of the nearby Be star Achernar in 2003 (VLTI/VINCI). Similar measurements obtained on Altair and Vega (2006). Discovery of the stellar wind of Achernar in 2007, and of its 5th magnitude close-in companion (separation 0.3") in 2007 using the VLT/VISIR instrument in diffraction-limited regime. Identification of the nature of this companion in 2008 (A2V star) using NACO imaging and long-slit spectroscopy (contrast 30, separation 150 mas). ESO accepted programs for 2009 with NACO (cube and SAM imaging).

 

Instrumentation for long-baseline interferometry:

- 2007-present: in charge of the scientific data reduction software of GRAVITY, one of the second generation VLTI instruments, aimed at ultra-high accuracy astrometry of the Galactic Center.

- 2006-present: member of the science team of VEGA (visible interferometric instrument).

- 2001-2004: reponsible at ESO of the successful VINCI instrument of the VLTI.

 

Teaching activities: ~90 h/yr

Fourier optics and coherence, Master 1, Obs. de Paris, Instrumentation module (18 h/yr)

Methodology course high angular resolution, Master 2 Research, Obs. de Paris (8 h/yr)

Post-Master course Proposals for large telescopes (15 h/yr)

Remote teaching Astronomy and Celestial Mechanics, Obs. De Paris (22 h/yr)

Pedagogical projets with school pupils (2 projects in 2006-2007, 1 project in 2007-2008)

 

Supervision of students:

2008-2011: supervisor of the Ph.D. Thesis of Alexandre Gallenne, together with Antoine Mérand on the subject of the characterization of Cepheid envelopes.

2005-2008: supervision of three Master 2 students, two Master 1 students, and one L3 student

 

Administrative and scientific reponsibilities:

- since 2007: elected member of the french Conseil National des Astronomes et Physiciens (CNAP), the institution in charge of the recruitement and career management of french astronomers.

- since 2007: member of the scientific council of the JMMC (center for long-baseline interferometry).

- since 2007: co-responsible of the FP7/OPTICON programme ÒEnhancing the scientific output of Interferometry with Denis Mourard and Françoise Delplancke.

- 2005-2007: expert adviser for the ESO OPC in panel D (stars), for four periods.

- referee for A&A, ApJ, PASP,... expert adviser for the European Research Council (ERC).

 

- Habilitation thesis, Paris 7 University, 11/07/2007:
    "Application of interferometry to the study of Cepheids and dwarf stars",
   
Manuscript (in french): http://tel.archives-ouvertes.fr/tel-00258916/en/

 

- 2002-2004: Fellow at ESO, Santiago and Cerro Paranal (Chile).

Responsible at ESO, first as PhD student then as fellow of the construction and operation of the highly successful VINCI instrument of the VLTI. Lead author of the data reduction software of this instrument. Experience of 300 nights at Paranal (VLTI commissioning and scientific observations), and more than 150 nights at other interferometric facilities (CHARA, PTI, IOTA).


- 1998-2001: PhD in Astrophysics, Paris 7 University and ESO, 14/11/2001:
    "Optical interferometry with the VLT – Application to the study of Cepheids", with High Honors,
    Manuscrit (in french): http://tel.archives-ouvertes.fr/tel-00258928/en/

 

- Master in Astrophysics and Space Science (1996-97), Paris 7 University, with High Honors

- Master in Mechanical and Structural Engineering (1995-96), Paris 6 University, with Honors


- Engineer in Electro-Mechanics (1993-96), Ecole Spéciale des Travaux Publics du Bâtiment et de l'Industrie (Paris), head of the list


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Publications in refereed journals:

Click here for my refereed publication list on ADS

54 articles, of which 23 as lead author, and 10 in second position, ~1100 citations, h-index=20

+ 5 A&A articles in refereeing process (lead author).


54) Mass-radius relation of low and very-low mass stars revisited with the VLTI

Demory B.-O., Ségransan D.,..., Kervella P., et al., A&A in press (2009)

 

53) High resolution spectroscopy for Cepheid distance determination - V. p-factor for the cross correlation method

Nardetto N., Gieren W., Kervella P., Fouqué P., Storm J., Mourard, D., & Queloz D. A&A in press (2009)

 

52) The circumstellar envelopes of the Cepheids L Car & RS Pup - Comparative study with Spitzer, VISIR, MIDI

Kervella P., Mérand A., Gallenne A.. A&A 498, 425 (2009)

 

51) The environment of the fast rotating star Achernar - Mid-infrared interferometry with VLTI/MIDI

Kervella P., Domiciano de Souza A., Kanaan S., Spang A., Stee Ph., A&A 493, L53 (2009)

50 - The nearby eclipsing stellar system delta Velorum. I. Origin of the IR excess from VISIR and NACO imaging

Kervella P., Thévenin F., Petr-Gotzens M., A&A 493, 107 (2009)

 

49 - The angular sizes of dwarf stars and subgiants. Non-linear surface brightness relations in BVRcIc

Kervella P., Fouqué P., A&A 491, 855 (2008)

 

48 - Interferometric observations of the nearby K dwarfs 61 Cyg A&B - Diameter measurements and modeling

Kervella P., Mérand A., Thévenin F., Heiter U., et al., A&A 488, 667 (2008)

 

47 - A near-infrared interferometric survey of debris disc stars - II. CHARA/FLUOR observations of six dwarfs

Absil O., Di Folco E., Mérand A.,..., Kervella P., et al., A&A 487, 1041 (2008)

 

46 - A low-mass planet with a possible sub-stellar-mass host in microlensing event MOA-2007-BLG-192

Bennett D. P., Bond I. A., Udalski A.,..., Kervella P., et al., ApJ 684, 663 (2008)

 

45 - The close-in companion of the fast rotating Be star Achernar

Kervella P., Domiciano de Souza A., & Bendjoya, Ph., A&A, 484, L13 (2008)

 

44 - High-resolution thermal infrared imaging of MWC300 - VLT/VISIR observations in BURST mode.

Domiciano de Souza A., Kervella P., Bendjoya Ph., & Niccolini G., A&A 480, L29 (2008)

 

43 - The long-period Galactic Cepheid RS Puppis - I. A geometric distance from its light echoes.

Kervella P., Mérand A., Szabados L., Fouqué P., et al., A&A 480, 167 (2008)

 

42 - A new calibration of Galactic Cepheid period-luminosity relations from B to K bands, and a comparison to LMC relations.

Fouqué P., Arriagada P., Storm J.,...,  Kervella P., et al., A&A 476, 73  (2007)

 

41 - A near-infrared interferometric survey of debris disk stars - I. Probing the hot dust content around epsilon Eridani and tau Ceti with CHARA/FLUOR.

Di Folco E., Absil O.,..., Kervella P., et al., A&A 475, 243  (2007)

 

40 - The environment of the fast rotating star Achernar. High-resolution thermal IR imaging with VISIR

Kervella P., & Domiciano de Souza A., A&A 474, L49  (2007)

 

39 - Asteroseismology and interferometry

Cunha M. S., Aerts C., Christensen-Dalsgaard J.,É, Kervella P. et al.., A&A Review, 14, 217  (2007)

 

38 - Interferometric observations of the multiple stellar system d Velorum

Kellerer A., Petr-Gotzens M. P., Kervella P., Coudé du Foresto V. A&A 469, 633 (2007)

 

37 - Extended envelopes around Cepheids III. Y Oph and alpha Per from near-IR interferometry with CHARA/FLUOR,

Mérand A., Aufdenberg J., Kervella P., Coudé du Foresto V., et al., ApJ 664, 1093 (2007)

 

36 - Interferometric observations of h Carinae with VINCI/VLTI

Kervella P. A&A 464, 1045 (2007)

 

35 - Deep imaging survey of the environment of alpha Cen - II. CCD imaging with the NTT-SUSI2 camera

Kervella P. & Thévenin F. A&A 464, 373 (2007)

 

34 - Multiple shock waves in the atmosphere of the Cepheid X Sgr ?

Mathias P., Gillet D., Fokin A. B., Nardetto N., Kervella P. & Mourard D., A&A 457, 575 (2006)

 

33 - Deep imaging survey of the environment of a Cen - I. Adaptive optics imaging of alpha Cen B with VLT-NACO

Kervella P., Thévenin F., Coudé du Foresto V. & Mignard F., A&A 459, 669 (2006)

 

32 - The polar wind of the fast rotating Be star Achernar – VINCI/VLTI observations of an elongated envelope

Kervella P. & Domiciano de Souza A., A&A 453, 1059 (2006)

 

31 - Long-baseline interferometric measurements of Vega consistent with a pole-on, rapidly rotating star

Aufdenberg J., Mérand A., Coudé V., Absil O., Di Folco E., Kervella P., et al., ApJ 645, 664 (2006) Err. ApJ 651, 617

 

30 - High resolution spectroscopy for Cepheids distance determination. I. Line asymmetry

Nardetto N., Mourard D., Kervella P., Mathias Ph., Mérand A., & Bersier D., A&A 453, 309 (2006)

 

29 - Extended envelopes around Cepheids II. Polaris and delta Cep from near-IR interferometry with CHARA/FLUOR,

Mérand A., Kervella P., Coudé du Foresto V., et al., A&A 453, 155 (2006)

 

28 - Circumstellar material in the inner Vega system revealed by CHARA/FLUOR

Absil O., Di Folco E., Mérand A., Coudé V., Augereau J.-C., Aufdenberg J., Kervella P., et al., A&A 452, 237 (2006)

 

27 - Extended envelopes around Cepheids I. L Car from near and mid-infrared interferometry with the VLTI

Kervella P., Mérand A., Perrin G., Coudé du Foresto V., A&A 448, 623 (2006)

 

26 - The limb darkening of alpha Cen B: Matching 3D hydrodynamical models  with interferometric measurements

Bigot L., Kervella P., Thévenin F., Ségransan D., A&A 446, 635 (2006)

 

25 - Gravitational-darkening of Altair from interferometry

Domiciano de Souza A., Kervella P., Jankov S., et al., A&A 442, 567 (2005)

 

24 - The projection factor of d Cephei - A calibration of the Baade-Wesselink method using the CHARA Array

Mérand A., Kervella P., Coudé du Foresto V., et al., A&A 438, L9 (2005)

 

23 - On the limb darkening, spectral energy distribution and temperature structure of Procyon

Aufdenberg J., Ludwig H. G., Kervella P., ApJ 633, 424 (2005)

 

22 - VINCI/VLTI diameter contraints on the evolutionary status of delta Eri, ksi Hya and eta Boo

Thevenin F., Kervella P., Pichon B., et al., A&A 436, 253 (2005)

 

21 - VLTI near-infrared observations of the stellar multiple system delta Velorum

Petr-Gotzens M. G., Kellerer A., Kervella P., Coudé du Foresto V., Astron. Nachrichten 326, 569 (2005)

 

20 - The angular size of dwarf stars and subgiants – Surface brightness relations calibrated by interferometry

Kervella P., Thévenin F.,  Ségransan D., Di Folco E., A&A 426, 297 (2004)

 

19 - Cepheid distances from long-baseline interferometry. III. Surface Brightness relations

Kervella P., Bersier D., Nardetto N., Mourard D., Fouqué P., Coudé du Foresto V., A&A 428, 587 (2004)

 

18 - Cepheid distances from long-baseline interferometry. II. Period-Radius and Period-Luminosity relations

Kervella P., Bersier D., Nardetto N., Mourard D., Coudé du Foresto V., A&A 423, 327 (2004)

 

17 - Cepheid distances from long-baseline interferometry. I. VINCI/VLTI observations of seven Galactic Cepheids,

Kervella P., Nardetto N., Bersier D., Mourard D., Coudé du Foresto V., A&A 416, 941 (2004)

 

16 - First observations with an H-band integrated optics beam combiner at the VLTI

LeBouquin J.-B., Rousselet-Perrault K., Kern P., Malbet F., Haguenauer P., Kervella P., et al., A&A 424, 719 (2004)

 

15 - Self consistent modelling of the projection factor for interferometric distance determination

Nardetto N., Fokin A., Mourard D., Mathias Ph., Kervella P., Bersier D., A&A 428, 131 (2004)

 

14 - VLTI observations of Vega-like stars. Radius and age of alpha PsA, beta Leo, beta Pic, epsilon Eri and tau Cet

Di Folco E., Thévenin F., Kervella P., Domiciano A., Coudé du Foresto V., et al., A&A 426, 601 (2004)

 

13 - From interferometric fringes to calibrated visibilities - Data analysis methods for the VINCI/VLTI instrument,

Kervella P., Ségransan D., Coudé du Foresto V., A&A 425, 1161 (2004)

 

12 - VLTI/VINCI observations of the nucleus of NGC 1068 using the adaptive optics system MACAO

Wittkowski M., Kervella P., Arsenault R., Paresce F., Beckert T., Weigelt G., A&A 418, L39 (2004)

 

11 - The angular size of L Carinae: Comparison of the interferometric and surface brightness techniques

Kervella P., Fouqué P., Storm J., Gieren W.P., Bersier D., Mourard D., et al., ApJ 604, 113 (2004)

 

10 - The diameter and evolutionary state of Procyon A

Kervella P., Thévenin F., Morel P., Provost J., Bordé P., Berthomieu G., A&A 413, 251 (2004)

 

9 - Test of stellar model atmospheres by interferometry - The limb darkening of the M4 giant psi Phe

Wittkowski M., Aufdenberg J. P., Kervella P., A&A 413, 711 (2004)

 

8 - Direct measurement of the size and shape of the star eta Carinae

Van Boekel R., Kervella P., Schšller M., Herbst T., Brandner W., de Koters A., et al. A&A 410, L37 (2003)

 

7 - The interferometric diameter and internal structure of Sirius

Kervella P., Thévenin F., Morel P., Bordé P., Di Folco E., A&A 408, 681 (2003)

 

6 - The spinning-top star Achernar from VLTI-VINCI interferometry

Domiciano de Souza A., Kervella P., Jankov S., Abe L., Vakili F., Di Folco E., Paresce F. A&A 407, L47 (2003)

 

5 - The diameters of a Centauri A and B: a comparison of the asteroseismic and VLT Interferometer views

Kervella P., Thévenin F., Ségransan S., et al. A&A 404, 1087 (2003), cover illustration of A&A

 

4 - First radius measurements of very low mass stars with the VLTI

Ségransan S., Kervella P., Forveille T., Queloz D., A&A 397, L5 (2003)

 

3 - Calibration of the Barnes-Evans relation using interferometric observations of Cepheids

Nordgren T.E., Lane B.F., Hindsley R.B., Kervella P., AJ 123, 3380 (2002)

 

2 - Interferometric evidence for very extended gaseous layers around O-rich Miras and M giants

Mennesson B., Perrin G.,..., Kervella P., Traub W., Lacasse M., ApJ 579, 446 (2002)

 

1 - The angular diameter and distance of the Cepheid zeta Gem

Kervella P., Coudé du Foresto V., Perrin G., Schöller M., Traub W. A., Lacasse M. G. A&A 367, 876 (2001)


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Conference proceedings:


Click here for my proceedings list on ADS

83 articles, of which 24 as lead author.

 

PEGASE, an infrared interferometer to study stellar environments and low mass companions around nearby stars

Ollivier M., ..., Kervella P., et al., Experimental Astronomy, 23, 403 (2009)

 

New Astrophysical Opportunities Exploiting Spatio-Temporal Optical Correlations

Barbieri C., ..., Kervella P., et al. Science white paper prepared for the Astro2010 Decadal Review7 (2009)

 

Stellar Astrophysics with SIM and Optical Long Baseline Interferometry

Ridgway S. T., ..., Kervella P., et al., American Astronomical Society, AAS Meeting #213, #455.07 (2009)

 

The complex environment of the fast rotating star Achernar

Kervella P., Domiciano de Souza A., Kanaan S., et al., Proc. SF2A 2008,

Eds.: C. Charbonnel, F. Combes & R. Samadi, p. 474, http://proc.sf2a.asso.fr

 

High-resolution thermal IR imaging of MWC300 with VLT/VISIR

Domiciano de Souza A., Kervella P., Bendjoya Ph.; Niccolini G., Proc. SF2A 2008,

Eds.: C. Charbonnel, F. Combes & R. Samadi, p. 455, http://proc.sf2a.asso.fr

 

Discovery of a Low-mass Planet Orbiting a Low-mass Star in Microlensing Event MOA-2007-BLG-192

Bennett D. P., ..., Kervella P., et al., American Astronomical Society, AAS Meeting #212, #10.12 (2008)

 

Toward a revival of Stellar Intensity Interferometry

LeBohec S.,..., Kervella P., et al., Proc. SPIE "Astronomical Telescopes and Instrumentation", Marseille (06/2008)

 

Asteroseismology and interferometry (article invité)

Schmider F.-X.,..., Kervella P., et al., Proc. SPIE "Astronomical Telescopes and Instrumentation", Marseille (06/2008)

 

GRAVITY: getting to the event horizon of Sgr A*

Eisenhauer F.,..., Kervella P. et al., Proc. SPIE "Astronomical Telescopes and Instrumentation", Marseille (06/2008)

 

VEGA: a new Visible spEctroGraph and polArimeter on the CHARA Array

Mourard D.,..., Kervella P., et al., Proc. SPIE "Astronomical Telescopes and Instrumentation", Marseille (06/2008)

 

Stellar radii from long-baseline interferometry

Kervella P., IAU Symp. 252, p. 405, "The Art of Modeling Stars in the 21st Century", Sanya, China, 5-11 April 2008

 

Proceedings The Power of Optical/IR Interferometry: Recent Scientific Results and 2nd Generation Instrumentation,

ESO Astrophysics Symposia, Volume ISBN 978-3-540-74253-1. Springer (2008):

- Fundamental Parameters of Delta Velorum, a Quintuple Stellar System

   Kellerer A., Petr-Gotzens M., Kervella P., & Coudé du Foresto C., p. 531

- Interferometric Aperture Synthesis of Altair: Gravity Darkening and Inclination Angle

   Domiciano de Souza A., Kervella P., Jankov S., et al., p. 487

- Evolutionary Modeling of Nearby Stars Using Asteroseismic and Interferometric Constraints

   Kervella P., & Thévenin F., p. 479

- GENIE: a Ground-Based European Nulling Instrument at ESO Very Large Telescope Interferometer

   Gondoin Ph.,..., Kervella P., et al., p. 445

- Eta Car through the Eyes of Interferometers

   Chesneau O.,..., Kervella P., et al., p. 131

- Cepheid observations using CHARA/FLUOR: alpha Umi and delta Cep

   Mérand A., Kervella P., Coudé du Foresto V., et al., p. 99

- Cepheid Distances from Interferometry

   Kervella P., Nardetto N., Bersier D., et al., p. 83

- Limb Darkening: Getting Warmer

   Aufdenberg, J. P., Ludwig H.-G., Kervella P., et al., p. 71

 

New facts about delta Velorum: fewer but larger components

Kellerer A., Petr-Gotzens M., Kervella P., Coudé du Foresto A., "Multiple Stars Across the H-R Diagram",

ESO Astrophysics Symposia, Volume . ISBN 978-3-540-74744-4. Springer-Verlag Berlin Heidelberg, p. 119 (2008)

 

GRAVITY: microarcsecond astrometry and deep interferometric imaging with the VLTI

Ensenhauer F.,..., Kervella P., et al., "A Giant Step: from Milli- to Micro-arcsecond Astrometry",

Proc. International Astronomical Union, IAU Symposium, Volume 248, p. 100 (2008)

 

Abundance analysis of  AlphaCen A : The 3D hydrodynamical approach

Bigot L., Thévenin F., Kervella P., Mem. S.A.It., 79, 3 (2008)

 

Prospects for a multi-wavelength characterization of Cepheid envelopes

Kervella P., Mérand A.

Proc. The pulsation of Cepheids – the CASSINI project conference, Paris, 9-13 Juillet 2007, sous presse

 

Interferometric angular diameters, linear radii and stellar modeling (invited talk)

Kervella P., Proc. 14th Cool Stars, Stellar Systems and the Sun workshop, Pasadena, 5-10 Novembre 2006

 

Observations of Achernar with VINCI

Kervella P., Proc. Euro Summer School Observation and data reduction with the VLTI , Goutelas, France (2006),

New Astronomy Reviews 51, 706 (2007)

 

Preparing ESO proposals

Kervella P., Proc. Euro Summer School Observation and data reduction with the VLTI , Goutelas, France (2006),

New Astronomy Reviews 51, 658 (2007)

 

Interferometry and asteroseismology of main sequence stars

Kervella P., Proc. ÒVisions in Infrared Astronomy, Paris, 20-22 Mars 2006

 

Interferometric constraints on gravity darkening with application to the modeling of Spica A&B

Aufdenberg J. P., Ireland M. J., Mérand A., Coudé du Foresto V., Absil O., di Folco E., Kervella P., et al.

Proc. IAU Symposium 240, 271 (2007)

 

VEGA: a visible spectrograph and polarimeter for CHARA – science cases description

Stee Ph., Mourard D., Bonneau D.,..., Kervella P., et al.,

Proc. SPIE Advances in stellar interferometry , Orlando, Floride, 6268, 119 (2006)

 

VEGA: a visible spectrograph and polarimeter for CHARA

Mourard D., Bonneau D.,..., Kervella P., et al.,

Proc. SPIE Advances in stellar interferometry, Orlando, Floride; 6268, 118 (2006)

 

Detection of the inner-debris disk of Vega with CHARA/FLUOR

Absil O., di Folco E., Mérand A.,..., Kervella P., et al.,

Proc. SPIE Advances in stellar interferometry, Orlando, Floride, 6268, 9 (2006)

 

Interferometric measurements of the A-type supergiant Deneb with the CHARA array

Aufdenberg J. P., Mérand A., Ridgway S. T.,..., Kervella P., et al.

Proc. AAS Meeting 208, #06.01 (2006)

 

Asteroseismology and interferometry

Thévenin F., Bigot L., Kervella P., et al.

Proc. Stellar Pulsation and Evolution 2005, Monte Porzio Catone, Italie, MmSAI 77, 411 (2006)

 

Cepheid distances from interferometry

Kervella P., Proc. Stellar Pulsation and Evolution 2005, Monte Porzio Catone, Italie, MmSAI 77, 227 (2006)

 

Interferometric observations of Cepheids. p-factor and center to limb darkening measurements

Mérand A., Kervella P., Coudé du Foresto V., et al.

Proc. Stellar Pulsation and Evolution 2005, Monte Porzio Catone, Italie, MmSAI 77, 231 (2006)

 

Interferometric gravity darkening observations of Vega with the CHARA array

Aufdenberg J. P., Mérand A., Coudé du Foresto V.,..., Kervella P., et al., Proc. AAS Meeting 207, #82.03 (2005)

 

Interferometric observations of Cepheids: the p-factor measurement

Mérand A., Kervella P., Coudé du Foresto V., Ten Brummelaar T., McAlister H.

Proc. Journées de la SF2A 2005, 311 (2005)

 
The interferometric calibration of the zero-point of the Cepheid P-L relation using interferometric observations

Kervella P., Proc. Cepheids Pulsation Workshop, Paris (Fév. 2005)

 

Procyon: Constraining its temperature structure with interferometry and 3-D model atmospheres

Aufdenberg J., Ludwig H.-G., Kervella P., Bersier D.

Proc. American Astronomical Society Meeting 205, #12.03  (2004)

 

The conversion factor from radial to pulsation velocity and the distances determination of classical Cepheids

Nardetto N., Fokin A., Mourard D., Mathias Ph., Kervella P., Bersier D.

Proc. Journées de la SF2A 2004, 295 (2004)

 

First observations of Vega-like stars with the VLTI

di Folco E., Thévenin F., Kervella P., Domiciano A., et al.

Proc. Journées de la SF2A 2004, 40 (2004)

 

The mass loss and life expectancy of h Carinae

De Koter A., Van Boekel R., Kervella P., Schöller M., Paresce F.,

Proc. The fate of the most massive stars, Grand Teton National Park, USA (2004)

 

Surface Brightness relations for dwarf stars and subgiants

Kervella P., Thévenin F., Ségransan D.

Proc. Cool Stars, Stellar Systems and the Sun 13, ESA-SP sous presse, Hambourg, Allemagne (2004)

 

Procyon A convection: interferometric, spectroscopic, and photometric data with PHOENIX models

Audenberg J., Kervella P., Mozurkewich D.

Proc. Cool Stars, Stellar Systems and the Sun 13, ESA-SP sous presse, Hambourg, Allemagne (2004)

 

Main Sequence stars as calibrators for interferometry

Kervella P., Thévenin F., Ségransan D., Di Folco E.

Proc. SPIE New frontiers in stellar interferometry, 5491, 1174 (2004)

 

Optimal interferometric data acquisition and processing: towards 0.1% precision with VINCI

Kervella P., Coudé du Foresto V., Ségransan D., Di Folco E.

Proc. SPIE New frontiers in stellar interferometry, 5491, 741 (2004)

 

Interferometric fringes with MACAO-VLTI corrected star light and VINCI

Arsenault R., Kervella P., Donaldson R., Kasper M., et al.

Proc. SPIE ALT'03 International Conference on Advanced Laser Technologies, 5490, 97 (2004)

 

VLTI technical advances: present and future

Glindemann A., Albertsen M., ..., Kervella P., et al.

Proc. SPIE New frontiers in stellar interferometry, 5491, 447 (2004)

 

Preparing MIDI science operations at Paranal

Morel S., Ballester P., ..., Kervella P., et al.,

Proc. SPIE New frontiers in stellar interferometry, 5491, 1666 (2004)

 

VLTI Science Operations at Paranal

Rantakiro F. T., Galliano E, Hummel C. A., Kaufer A., Kervella  P., Morel S., et al.

Proc. SPIE New frontiers in stellar interferometry, 5491, 1690 (2004)

 

VLTI NIR-interferometric observations of Vega-like stars

Di Folco E., Kervella P., Thévenin F., et al.

Proc. IAU Symposium 221, XXVth IAU General Assembly, Sydney, Australie, 264 (2003)

 

VINCI/VLTI observations of Main Sequence stars

Kervella P., Thévenin F., Ségransan D., et al.

Proc. IAU Symposium 219, XXVth IAU General Assembly, Sydney, Australie, 127 (2003)

 

Modeling of a Centauri and Procyon using VLTI observations

Kervella P., Thévenin F., Morel P., et al.

Proc. IAU Joint Discussion 12, XXVth IAU General Assembly, Sydney, Australie, 57 (2003)

 

VINCI/VLTI interferometric observations of Cepheids

Nardetto N., Kervella P., Mourard D., Bersier D., Coudé du Foresto V.

Proc. IAU Colloquium 193, Variable Stars in the Local Group, ASP Conf. Ser. 310, 520 (2003)

 

Interferometric Observations of Cepheids with VINCI/VLTI

Kervella P., Nardetto N., Mourard D., Bersier D.,  Coudé du Foresto V.

Proc. Journées de la SF2A 2003, Paris, 531 (2003)

 

Report on VLTI/VINCI observations of the Be star Achernar

Domiciano de Souza A., Kervella P., Jankov S.,  Abe L., et al.,

Proc. Journées de la SF2A 2003, Paris, 515 (2003)

 

VINCI: status after one year of operation

Kervella P., Gitton Ph., Di Folco E., et al.

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 858 (2003)

 

Atmospheric and internal turbulence measured on the Very Large Telescope Interferometer with VINCI

Di Folco E., Koehler B.,  Kervella P., Sarazin M., et al.

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 1115 (2003)

 

Commissioning the VLT interferometer: from first fringes toward a general user facility

Schšller M., Gitton Ph., ...,  Kervella P.,  et al.

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 870 (2003)

 

Nulling interferometric breadboard using integrated optics, preparation to the IRSI/DARWIN mission

Haguenauer P., Barillot M., Kern P., ...,  Kervella P.,

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 690 (2003)

 

Increasing the imaging capabilities of the VLTI using integrated optics

Kern P..,  Malbet F.,..., Kervella P., et al.

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 312 (2003)

 

VLTI image alignment monitoring

Gitton Ph.,  Cantzler M., Koehler B., Kervella P.,

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 1182 (2003)

 

First scientific results from the VLTI

Paresce F., Cabanero S., Correia S., Di Folco E., Glindemann A., Kervella P., Richichi A., Schöller M., et al.

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 235 (2003)

 

The VLTI: a status report

Glindemann A.,  Argomedo J., ..., Kervella P., et al.

Proc. SPIE Interferometry for Optical Astronomy II, Traub éd., 4838, 89 (2003)

 

Infrared interferometry at the ESO VLTI

Richichi A., Glindemann A., Kervella P., Paresce F., Schöller M., et al.

Memorie della Societa Astronomica Italiana, 74, 126 (2003)

 

The VLT Interferometer

Paresce F., Glindemann A., Kervella P., Richichi A., Schöller M., et al.

Memorie della Societa Astronomica Italiana, 74, 295 (2003)

 

Recent Cepheid observations with the VLT Interferometer

Kervella P., Proc.Stellar Candles for the Extragalactic Distance Scale, Gieren & Alloin éd. (12/2002)

 

VINCI after one year at Paranal: lessons learned for GENIE

Kervella P., Proc. Genie/Darwin Workshop – Hunting for planets, ESA SP-522, Fridlund éd. (06/2002)

 

The VLTI and its subsystems

Glindemann A., Argomedo J.,..., Kervella P.,  et al.

Proc. Genie/Darwin Workshop – Hunting for planets, ESA SP-522, Fridlund éd. (06/2002)

 

First Science  results from the VLT Interferometer

Paresce F., Glindemann A., Kervella P., Richichi A., Schöller M., et al.

Proc. Astronomy, Cosmology and Fundamental Physics,  ESO-CERN-ESA Symposium (03/2002), 43

 

Interferometric observations of eta Carinae - the VLTI takes its first glimpse at the central source

Kervella P., Schöller M., van Boekel R., et al.

Proc. IAU Colloquium 187, Exotic Stars as Challenges to Evolution (2002), ASP Conf. Ser. 279, 99

 

The VLT Interferometer Data Flow System: From Observation Preparation to Data Processing

Ballester P., Chavan M.,  ..., Kervella P.,  et al.

Proc. SPIE Observatory Operations to Optimize Scientific Return III, Quinn éd., 4844, 300 (2002)

  

Ground Interferometric Searches

Glindemann A., Delplancke F., Kervella P., Paresce F., Richichi A., Schöller M.

Proc. IAU Symp. 202,  Planetary Systems in the Universe, ASP Conf., 30, 26 (2001)

 

The VINCI instrument software in the VLT environment

Longinotti A., Bickert K., Cautain R., Dupin J.-P., Kervella P., et al.

Proc. SPIE 12th IEEE Real-Time NPSS (2001)

 

Data flow system for the very large telescope interferometer

Ballester P., Chavan M.,  ..., Kervella P.,  et al.

Proc. SPIE Astronomical Data Analysis, Quinn éd., 4477, 225 (2001)

 

ESO's VLT interferometer - first results

Glindemann A., Bauvir B.,..., Kervella P.,  et al.

Proc. From optical to millimetric interferometry, 27 (Liège 07/2001)

 

The VLTI Adulthood: Scientific drivers for future VLTI instrumentation

Paresce F., Delplancke F., Kervella P.,  Richichi A.

Proc. Scientific Drivers for ESO Future VLT/VLTI Instrumentation, 289 (Garching 06/2001)

 

Growing Up : The completion of the VLTI

Glindemann A., Bauvir B.,..., Kervella P.,  et al.

Proc. Scientific Drivers for ESO Future VLT/VLTI Instrumentation, 279 (Garching 06/2001)

 

VINCI: the VLT Interferometer commissioning instrument

Kervella P., Coudé du Foresto V., Glindemann A., Hofmann R.

Proc. SPIE Interferometry in Optical Astronomy, 4006, 31, Léna & Quirrenbach ed. (2000)

 

Cepheid observations by long-baseline interferometry with FLUOR/IOTA

Kervella, P., Coudé du Foresto, V., Traub, W. A., Lacasse, M. G.

Proc. SPIE Interferometry in Optical Astronomy,  4006, 551, Léna & Quirrenbach ed. (2000)

 

Phase-referenced imaging and micro-arcsecond astrometry with the VLTI (PRIMA)

Delplancke F., Leveque S, Glindemann A., Kervella P., d'Arcio L.

Proc. SPIE Interferometry in Optical Astronomy, 4006, 365, Léna & Quirrenbach ed. (2000)

 

VLT Interferometer: a unique instrument for high-resolution astronomy

Glindemann A., Abuter R., ..., Kervella P.,  et al.

Proc. SPIE Interferometry in Optical Astronomy, 4006, 2, Léna & Quirrenbach ed. (2000)

 

Ground interferometric searches

Glindemann A., Delplancke F., Kervella P.,  et al.

Proc. IAU Symposium 202,  Planetary Systems in the Universe, 26 (2000)

 

Interferometric observations of the Cepheid zeta Geminorum with FLUOR / IOTA

Kervella P., Coudé du Foresto V., Traub W. A., Lacasse M. G

Proc.  Working on the Fringe, ASP Conference Series 194, 22 (1999)


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Habilitation à Diriger des Recherches:

Application of interferometry to the study of Cepheids and dwarf stars

Defended on 11 July 2007 at Institut d'Astrophysique de Paris

Manuscript (in french): http://tel.archives-ouvertes.fr/tel-00258916/en/

Jury: G. Rousset (President), A. Barrau (Referee), A. Chelli (Referee), P. Léna (Referee),

D. Bersier, P. Fouqué, D. Mourard, F. Thévenin

 

Optical interferometry is a powerful technique for the study of stars in exquisite details, by enabling the spatial resolution of their disks. I present three applications of this technique to the study of different types of stars: Cepheids, main sequence stars, and fast rotators. Cepheids are a famous class of supergiants that are widely used as standard candles for distance measurements, through the period-luminosity (P-L) relations. Interferometry allows to apply a refined version of the Baade--Wesselink method to estimate the distance to nearby Cepheids, and therefore calibrate the P--L relations. While this method is promising and potentially very precise, several points in its application are critical, in particular the projection factor. Main sequence stars are by far the most numerous stellar class in the universe, as all stars spend the majority of their life as dwarfs. I have applied interferometry to a broad range of main sequence stars, from the very low mass {Proxima} to hot stars. In particular, I have realized the first combination of interferometric and asteroseismic constraints for the modeling of stars (the two components of Alpha Centauri, as well as other stars). In a third part, I describe the recent results that we have obtained on fast rotating stars. Due to the very strong centrifugal force at the equator, the photosphere of these stars is strongly distorted. Interferometry allows to observe these deformations, and I describe our observations of three bright, fast rotating stars: Altair (Alpha Aql), Achernar (Alpha Eri) and Vega (Alpha Lyr).


PhD Thesis:

Optical interferometry with the VLT – Application to the study of Cepheids

Defended on 14 November 2001 at the Observatoire de Paris, in Meudon, with High Honors

Manuscript (in french): http://tel.archives-ouvertes.fr/tel-00258928/en/

Advisors: P. Léna (Paris 7 Univ.), V. Coudé du Foresto (Obs. de Paris) and A. Glindemann (ESO)

Jury: D. Rouan (President), D. Mourard (Referee), S. T. Ridgway (Referee), P. Léna,

A. Glindemann, V. Coudé du Foresto

 

Installed at the heart of the Very Large Telescope Interferometer (VLTI, located on top of the Cerro Paranal, in northern Chile), the VINCI instrument allows to combine coherently the infrared light coming from two separate telescopes. Therefore, it opens an access to very high angular resolution observations of the sky (down to a few milliarcseconds). Many important astrophysical questions will be adressed by this instrumen t: the physics of stars, protoplanetary disks and extrasolar planets, among other programs. My thesis work on the VINCI instrument has covered its conception, in particular the functionnal definition of its software system, its installation on top of the Cerro Paranal and its first scientific observations. In the first part of this document, I describe the principles of the beam combination with VINCI and its performances both in the laboratory and in real observational conditions.

In a second part, I describe the application of long-baseline optical interferometry to the study of the Cepheid variable stars. These pulsating supergiants play a fundamental role in the measurement of distances in the Universe, since it has been established that their photometric variation period it linked to their intrinsic luminosity through the famous period-luminosity relationship. The calibration of this relation requires that the distance to a number of nearby Cepheids is measured directly, unfortunately, these distances are currently poorly known, even to the closest Cepheids. The very high angular resolution allowed by VINCI and the VLTI will soon enable the refined study of the pulsation of the nearby Cepheids. By combining simultaneous observations of the radial velocity of their photosphere with angular diameter measurements, it will be possible to estimate directly their distance. The goal of this program: the calibration of the period-luminosity relationship with a precision better than 0,01 mag, a factor ten better than our current knowledge. In addition to this fundamental program, I decribe also the possibilities offered by VINCI for the study of the main sequence dwarfs, in particular solar-type stars (with an application to the binary star Aplha Centauri A and B), and I briefly discuss the case of the extrasolar giant planets.

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Other publications:


From the Dynamics of Cepheids to the Milky Way Rotation and the Calibration of the Distance Scale

Nardetto N., Kervella P., Barnes T., et al., ESO Messenger, 134, 20 (2008)

 

Les étoiles déformées par la rotation

Kervella P., Pour la Science, 329 (march 2005)

 

Recent scientific results from the VLTI

Wittkowski M., Paresce F., Chesneau O., Kervella P., et al., ESO Messenger, 119, 36 (2005)

 

LÕinfluence de la rotation sur la forme des étoiles

Kervella P., Journal de l'Association Astronomique de Franche-Comté  Le Point Astro (novembre 2005)

 

Cepheid pulsations resolved by the VLTI

Kervella P., Bersier D., Nardetto N., Mourard D., Fouqué P., Coudé du Foresto V., ESO Messenger, 117, 53 (2004)

 

The VLTI Data Flow System: from observation preparation to data processing

Ballester P., Kervella P., Rasmussen L. P., Richichi A., Sabet C., Schöller M., et al., ESO Messenger, 106, 2 (2001)

 

First fringes with ANTU and MELIPAL

Gllindemann A., Ballester P.,..., Kervella P.,  et al., ESO Messenger, 106, 1 (2001)

 

Light at the end of the tunnel - First Fringes with the VLTI

Glindemann A., Bauvir B., Delplancke F.,..., Kervella P., et al., ESO Messenger, 104, 2 (2001)

 

The VLTI – The Observatory of the 21st Century

Glindemann A., Abuter R., Carbognani F.,..., Kervella P., et al., ESO Messenger, 98, 2 (1999)

 

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ESO Press Releases:

Sharpest view of Betelgeuse’s ‘plumage’ reveals how supergiant stars lose mass – July 2009

Light echoes tell the distance to a Cepheid – February 2008

Cepheids and their 'Cocoons' – February 2006

Measuring Cosmic Distances with Stellar Heart Beats – October 2004

The Flattest Star Ever Seen – June 2003

A Family Portrait of the a Centauri System  March 2003

How Small are Small Stars really ? – November 2002

Four Eyes are Better – September 2002

Giant Eyes for the VLT Interferometer – November 2001

First Light for the VLT Interferometer – March 2001

MONA, LISA and VINCI soon to travel to Paranal – November 2000