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Catalogue POP – Notice individuelle de publication

Miglio Andrea, Chiappini Cristina, Mosser Benoît, Davies Guy R., Freeman Kenneth C., Girardi Léo, Jofré Paula, Kawata D., Rendle B. M., Valentini Marica, Casagrande Luca, Chaplin William J., Gilmore Gerald F., Hawkins Keith, Holl B., Appourchaux Thierry, Belkacem Kevin, Bossini Diego, Brogaard K., Goupil Marie-José, Montalbán Josefina, Noels Arlette, Anders Friedrich, Rodrigues T., Piotto Giampaolo, Pollacco Don, Rauer Heike, Allende Prieto Carlos, Avelino P. P., Babusiaux Carine, Barban Caroline, Barbuy Beatriz, Basu Sarbani, Baudin Frederic, Benomar Othman, Bienaymé Olivier, Binney J., Bland-Hawthorn Joss, Bressan A., Cacciari C., Campante Tiago L., Cassisi S., Christensen-Dalsgaard Jörgen, Combes Françoise, Creevey Orlagh L., Cunha M. S., Jong R. S., De Laverny P., Degl'Innocenti S., Deheuvels Sébastien, Depagne Éric, De Ridder Joris, Matteo P. Di, Mauro M. P. Di, Dupret Marc-Antoine, Eggenberger Patrick, Elsworth Yvonne P., Famaey Benoît, Feltzing Sofia, Garcia Rafael A., Gerhard Ortwin, Gibson Brad K., Gizon Laurent, Haywood Misha, Handberg Rasmus, Heiter U., Hekker Saskia, Huber Daniel, Ibata Rodrigo A., Katz David, Kawaler Steven D., Kjeldsen Hans, Kurtz Donald W., Lagarde Nadège, Lebreton Yveline, Lund Mikkel N., Majewski Steven R., Marigo P., Martig Marie, Mathur Savita, Minchev I., Morel Thierry, Ortolani Sergio, Pinsonneault Marc H., Plez Bertrand, Moroni P. G. Prada, Pricopi D., Recio-Blanco Alejandra, Reylé Céline, Robin A., Roxburgh Ian W., Salaris M., Santiago Basilio, Schiavon Ricardo P., Serenelli Aldo, Sharma S., Aguirre Victor Silva, Soubiran Caroline, Steinmetz Matthias, Stello Dennis, Strassmeier K. G., Ventura Paolo, Ventura R., Walton Nicholas A., Worley C. C.

PLATO as it is : A legacy mission for Galactic archaeology

Astronomische Nachrichten, 2017, vol. 338, pp. 644-661

Référence DOI : 10.1002/asna.201713385
Référence ADS : 2017AN....338..644M

Résumé :

Deciphering the assembly history of the Milky Way is a formidable task, which becomes possible only if one can produce high-resolution chrono-chemo-kinematical maps of the Galaxy. Data from large-scale astrometric and spectroscopic surveys will soon provide us with a well-defined view of the current chemo-kinematical structure of the Milky Way, but will only enable a blurred view on the temporal sequence that led to the present-day Galaxy. As demonstrated by the (ongoing) exploitation of data from the pioneering photometric missions CoRoT, Kepler, and K2, asteroseismology provides the way forward: solar-like oscillating giants are excellent evolutionary clocks thanks to the availability of seismic constraints on their mass and to the tight age-initial-mass relation they adhere to. In this paper we identify five key outstanding questions relating to the formation and evolution of the Milky Way that will need precise and accurate ages for large samples of stars to be addressed, and we identify the requirements in terms of number of targets and the precision on the stellar properties that are needed to tackle such questions. By quantifying the asteroseismic yields expected from PLATO for red-giant stars, we demonstrate that these requirements are within the capabilities of the current instrument design, provided that observations are sufficiently long to identify the evolutionary state and allow robust and precise determination of acoustic-mode frequencies. This will allow us to harvest data of sufficient quality to reach a 10% precision in age. This is a fundamental pre-requisite to then reach the more ambitious goal of a similar level of accuracy, which will only be possible if we have to hand a careful appraisal of systematic uncertainties on age deriving from our limited understanding of stellar physics, a goal which conveniently falls within the main aims of PLATO's core science.

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