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Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko
File(s)
Author(s)
Hassig, M
Altwegg, K
Balsiger, H
Bar-Nun, A
Berthelier, JJ
Type
Journal Article
Abstract
Comets contain the best-preserved material from the 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 (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) onboard the Rosetta spacecraft has measured the coma composition of comet 67P/Churyumov-Gerasimenko with well-sampled time resolution per rotation. 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: water, carbon monoxide, and carbon dioxide. These results indicate a complex coma-nucleus relationship where seasonal variations may be driven by temperature differences just below the comet surface.
Date Issued
2015-01-23
Date Acceptance
2014-12-31
Citation
Science, 2015, 347 (6220)
URI
DOI
ISSN
0036-8075
Publisher
American Association for the Advancement of Science
Journal / Book Title
Science
Volume
347
Issue
6220
Copyright Statement
© 2015 The Authors. Published under license by the American Association for the Advancement of Science. This is the author’s version of the work. It is posted here by permission of the AAAS for personal
use, not for redistribution. The definitive version was published in Science,Vol. : 34 no. 6220 (2015), DOI: 10.1126/science.aaa0276
License URL
Sponsor
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council [2006-2012]
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000348225800032&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
ST/K001051/1
ST/K001051/1
Subjects
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
COMETS
Publication Status
Published
Article Number
ARTN aaa0276