Rosetta's comet 67P/Churyumov- Gerasimenko sheds its dusty mantle to reveal its icy nature

S. Fornasier, S. Mottola, H. U. Keller, M. A. Barucci, B. Davidsson, C. Feller, J. D.P. Deshapriya, H. Sierks, C. Barbieri, P. L. Lamy, R. Rodrigo, D. Koschny, H. Rickman, M. A'Hearn, J. Agarwal, J. L. Bertaux, I. Bertini, S. Besse, G. Cremonese, V. Da DeppoS. Debei, M. De Cecco, J. Deller, M. R. El-Maarry, M. Fulle, O. Groussin, P. J. Gutierrez, C. Güttler, M. Hofmann, S. F. Hviid, W. H. Ip, L. Jorda, J. Knollenberg, G. Kovacs, R. Kramm, E. Kührt, M. Küppers, M. L. Lara, M. Lazzarin, J. J.Lopez Moreno, F. Marzari, M. Massironi, G. Naletto, N. Oklay, M. Pajola, A. Pommerol, F. Preusker, F. Scholten, X. Shi, N. Thomas, I. Toth, C. Tubiana, J. B. Vincent

研究成果: 雜誌貢獻期刊論文同行評審

91 引文 斯高帕斯(Scopus)

摘要

The Rosetta spacecraft has investigated comet 67P/Churyumov-Gerasimenko from large heliocentric distances to its perihelion passage and beyond.We trace the seasonal and diurnal evolution of the colors of the 67P nucleus, finding changes driven by sublimation and recondensation of water ice. The whole nucleus became relatively bluer near perihelion, as increasing activity removed the surface dust, implying that water ice is widespread underneath the surface.We identified large (1500 square meters) ice-rich patches appearing and then vanishing in about 10 days, indicating small-scale heterogeneities on the nucleus. Thin frosts sublimating in a few minutes are observed close to receding shadows, and rapid variations in color are seen on extended areas close to the terminator. These cyclic processes are widespread and lead to continuously, slightly varying surface properties.

原文???core.languages.en_GB???
頁(從 - 到)1566-1570
頁數5
期刊Science
354
發行號6319
DOIs
出版狀態已出版 - 23 12月 2016

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