Subsurface properties and early activity of comet 67P/Churyumov-Gerasimenko

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Fältnamn	Indikatorer	Metadata
000		03006naa a2200553 4500
001		oai:DiVA.org:uu-247152
003		SwePub
008		150313s2015 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2471522 URI
024	7	a https://doi.org/10.1126/science.aaa07092 DOI
040		a (SwePub)uu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Gulkis, Samuel4 aut
245	1 0	a Subsurface properties and early activity of comet 67P/Churyumov-Gerasimenko
264	1	b American Association for the Advancement of Science (AAAS),c 2015
338		a print2 rdacarrier
520		a 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.
650	7	a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
700	1	a Allen, Mark4 aut
700	1	a von Allmen, Paul4 aut
700	1	a Beaudin, Gerard4 aut
700	1	a Biver, Nicolas4 aut
700	1	a Bockelee-Morvan, Dominique4 aut
700	1	a Choukroun, Mathieu4 aut
700	1	a Crovisier, Jacques4 aut
700	1	a Davidsson, Björn J. R.u Uppsala universitet,Teoretisk astrofysik4 aut0 (Swepub:uu)bjoda312
700	1	a Encrenaz, Pierre4 aut
700	1	a Encrenaz, Therese4 aut
700	1	a Frerking, Margaret4 aut
700	1	a Hartogh, Paul4 aut
700	1	a Hofstadter, Mark4 aut
700	1	a Ip, Wing-Huen4 aut
700	1	a Janssen, Michael4 aut
700	1	a Jarchow, Christopher4 aut
700	1	a Keihm, Stephen4 aut
700	1	a Lee, Seungwon4 aut
700	1	a Lellouch, Emmanuel4 aut
700	1	a Leyrat, Cedric4 aut
700	1	a Rezac, Ladislav4 aut
700	1	a Schloerb, F. Peter4 aut
700	1	a Spilker, Thomas4 aut
710	2	a Uppsala universitetb Teoretisk astrofysik4 org
773	0	t Scienced : American Association for the Advancement of Science (AAAS)g 347:6220q 347:6220x 0036-8075x 1095-9203
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-247152
856	4 8	u https://doi.org/10.1126/science.aaa0709

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