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Catalogue POP – Notice individuelle de publication

El-Maarry Mohamed Ramy, Groussin Olivier, Thomas Nicholas, Pajola Maurizio, Auger Anne-Thérèse, Davidsson Björn, Hu X., Hviid Stubbe F., Knollenberg Jörg, Güttler Carsten, Tubiana Cecilia, Fornasier Sonia, Feller Clément, Hasselmann Pedro Henrique, Vincent Jean-Baptiste, Sierks Holger, Barbieri Cesare, Lamy Philippe, Rodrigo Rafael, Koschny Detlef, Keller Horst Uwe, Rickman Hans, A'Hearn M. F., Barucci Maria Antonella, Bertaux Jean-Loup, Bertini Ivano, Besse Sébastien, Bodewits Dennis, Cremonese Gabriele, Da Deppo Vania, Debei Stefano, De Cecco M., Deller Jakob, Deshapriya J. D. P., Fulle Marco, Gutierrez Pedro J., Hofmann M., Ip W., Jorda Laurent, Kovacs Gabor, Kramm Rainer, Kührt Ekkehard, Küppers Michael, Lara Luisa M., Lazzarin Monica, Lin Zhong-Yi, López-Moreno José J., Marchi Simone, Marzari Francesco, Mottola Stefano, Naletto Giampiero, Oklay Nilda, Pommerol Antoine, Preusker Frank, Scholten Frank, Shi X.

Surface changes on comet 67P/Churyumov-Gerasimenko suggest a more active past

Science, 2017, vol. 355, pp. 1392-1395

Référence DOI : 10.1126/science.aak9384
Référence ADS : 2017Sci...355.1392E

Résumé :

The Rosetta spacecraft spent ~2 years orbiting comet 67P/Churyumov-Gerasimenko, most of it at distances that allowed surface characterization and monitoring at submeter scales. From December 2014 to June 2016, numerous localized changes were observed, which we attribute to cometary-specific weathering, erosion, and transient events driven by exposure to sunlight and other processes. While the localized changes suggest compositional or physical heterogeneity, their scale has not resulted in substantial alterations to the comet's landscape. This suggests that most of the major landforms were created early in the comet's current orbital configuration. They may even date from earlier if the comet had a larger volatile inventory, particularly of CO or CO<SUB>2</SUB> ices, or contained amorphous ice, which could have triggered activity at greater distances from the Sun.

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