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Subsurface properti...
Subsurface properties and early activity of comet 67P/Churyumov-Gerasimenko
- Article/chapterEnglish2015
Publisher, publication year, extent ...
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American Association for the Advancement of Science (AAAS),2015
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Numbers
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LIBRIS-ID:oai:DiVA.org:uu-247152
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-247152URI
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https://doi.org/10.1126/science.aaa0709DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Heat transport and ice sublimation in comets are interrelated processes reflecting properties acquired at the time of formation and during subsequent evolution. The Microwave Instrument on the Rosetta Orbiter (MIRO) acquired maps of the subsurface temperature of comet 67P/Churyumov-Gerasimenko, at 1.6 mm and 0.5 mm wavelengths, and spectra of water vapor. The total H2O production rate varied from 0.3 kg s(-1) in early June 2014 to 1.2 kg s(-1) in late August and showed periodic variations related to nucleus rotation and shape. Water outgassing was localized to the "neck" region of the comet. Subsurface temperatures showed seasonal and diurnal variations, which indicated that the submillimeter radiation originated at depths comparable to the diurnal thermal skin depth. A low thermal inertia (similar to 10 to 50 J K-1 m(-2) s(-0.5)), consistent with a thermally insulating powdered surface, is inferred.
Subject headings and genre
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Allen, Mark
(author)
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von Allmen, Paul
(author)
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Beaudin, Gerard
(author)
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Biver, Nicolas
(author)
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Bockelee-Morvan, Dominique
(author)
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Choukroun, Mathieu
(author)
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Crovisier, Jacques
(author)
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Davidsson, Björn J. R.Uppsala universitet,Teoretisk astrofysik(Swepub:uu)bjoda312
(author)
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Encrenaz, Pierre
(author)
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Encrenaz, Therese
(author)
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Frerking, Margaret
(author)
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Hartogh, Paul
(author)
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Hofstadter, Mark
(author)
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Ip, Wing-Huen
(author)
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Janssen, Michael
(author)
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Jarchow, Christopher
(author)
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Keihm, Stephen
(author)
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Lee, Seungwon
(author)
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Lellouch, Emmanuel
(author)
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Leyrat, Cedric
(author)
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Rezac, Ladislav
(author)
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Schloerb, F. Peter
(author)
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Spilker, Thomas
(author)
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Uppsala universitetTeoretisk astrofysik
(creator_code:org_t)
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In:Science: American Association for the Advancement of Science (AAAS)347:62200036-80751095-9203
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Gulkis, Samuel
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Allen, Mark
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von Allmen, Paul
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Beaudin, Gerard
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Biver, Nicolas
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Bockelee-Morvan, ...
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Choukroun, Mathi ...
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Crovisier, Jacqu ...
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Davidsson, Björn ...
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Encrenaz, Pierre
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Encrenaz, Theres ...
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Frerking, Margar ...
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Hartogh, Paul
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Hofstadter, Mark
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Ip, Wing-Huen
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Janssen, Michael
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Jarchow, Christo ...
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Keihm, Stephen
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Lee, Seungwon
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Lellouch, Emmanu ...
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Leyrat, Cedric
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Rezac, Ladislav
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Schloerb, F. Pet ...
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Spilker, Thomas
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Uppsala University