Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko | Zendy

M. Hässig | Zendy; K. Altwegg | Zendy; H. Balsiger | Zendy; A. BarNun | Zendy; J. J. Berthelier | Zendy; A. Bieler | Zendy; P. Bochsler | Zendy; Christelle Briois | Zendy; Ursina Calmonte | Zendy; M. R. Combi | Zendy; Johan De Keyser | Zendy; P. Eberhardt | Zendy; Björn Fiethe | Zendy; S. A. Fuselier | Zendy; M. Galand | Zendy; S. Gasc | Zendy; T. I. Gombosi | Zendy; K. C. Hansen | Zendy; A. Jäckel | Zendy; H. U. Keller | Zendy; E. Kopp | Zendy; A. Korth | Zendy; E. Kührt | Zendy; L. Le Roy | Zendy; U. Mall | Zendy; Bernard Marty | Zendy; O. Mousis | Zendy; Eddy Neefs | Zendy; Tobias Owen | Zendy; H. Rème | Zendy; M. Rubı́n | Zendy; T. Sémon | Zendy; Carmen Tornow | Zendy; Chia-Yu Tzou | Zendy; J. H. Waite | Zendy; P. Wurz | Zendy

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Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko

Author(s) -

M. Hässig,

K. Altwegg,

H. Balsiger,

A. BarNun,

J. J. Berthelier,

A. Bieler,

P. Bochsler,

Christelle Briois,

Ursina Calmonte,

M. R. Combi,

Johan De Keyser,

P. Eberhardt,

Björn Fiethe,

S. A. Fuselier,

M. Galand,

S. Gasc,

T. I. Gombosi,

K. C. Hansen,

A. Jäckel,

H. U. Keller,

E. Kopp,

A. Korth,

E. Kührt,

L. Le Roy,

U. Mall,

Bernard Marty,

O. Mousis,

Eddy Neefs,

Tobias Owen,

H. Rème,

M. Rubı́n,

T. Sémon,

Carmen Tornow,

Chia-Yu Tzou,

J. H. Waite,

P. Wurz

Publication year - 2015

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.aaa0276

Subject(s) - comet , coma (optics) , outgassing , orbiter , solar system , astrobiology , physics , rotation (mathematics) , comet nucleus , environmental science , range (aeronautics) , rotation period , astrophysics , atmospheric sciences , astronomy , materials science , stars , geometry , mathematics , composite material

International audienceComets contain the best-preserved material from the very beginning of our planetary system. Their nuclei and comae composition reveal clues about physical and chemical conditions during the early Solar system when comets formed. ROSINA/DFMS (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis / Double Focusing Mass Spectrometer) onboard the Rosetta spacecraft has measured the coma composition of comet 67P/Churyumov-Gerasimenko (67P) with excellent time resolution and compositional detail. Measurements were made over many comet rotation periods and a wide range of latitudes. These measurements show large fluctuations in composition in a heterogeneous coma that has diurnal and possibly seasonal variations in the major outgassing species: H2O, CO, and CO2. These results indicate a complex coma-nucleus relationship where seasonal variations may be driven by temperature differences near the comet surface

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