Distribution of water around the nucleus of comet 67P/Churyumov-Gerasimenko at 3.4 AU from the Sun as seen by the MIRO instrument on Rosetta

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101646

Title:	Distribution of water around the nucleus of comet 67P/Churyumov-Gerasimenko at 3.4 AU from the Sun as seen by the MIRO instrument on Rosetta
Authors:	葉永烜;Biver, N.;Hofstadter, M.;Gulkis, S.;Bockelée-Morvan, D.;Choukroun, M.;Lellouch, E.;Schloerb, F. P.;Rezac, L.;Ip, W. H.;Jarchow, C.;Hartogh, P.;Lee, S.;von Allmen, P.;Crovisier, J.;Leyrat, C.;Encrenaz, P.
Contributors:	理學院天文研究所
Keywords:	Astronomy and Astrophysics;Astrophysics;comets: general;comets: individual: 67P/Churyumov-Gerasimenko;Physics;radio lines: planetary systems;Sciences of the Universe;Space and Planetary Science;submillimeter: planetary systems
Date:	2015-11-01
Issue Date:	2026-04-21 14:39:58 (UTC+8)
Publisher:	EDP Sciences
Abstract:	摘要： The Microwave Instrument on the Rosetta Orbiter (MIRO) has been observing the coma of comet 67P/Churyumov-Gerasimenko almost continuously since June 2014 at wavelengths near 0.53 mm. We present here a map of the water column density in the inner coma (within 3 km from nucleus center) when the comet was at 3.4 AU from the Sun. Based on the analysis of the H216O and H218O (110-101) lines, we find that the column density can vary by two orders of magnitude in this region. The highest column density is observed in a narrow region on the dayside, close to the neck and north pole rotation axis of the nucleus, while the lowest column density is seen against the nightside of the nucleus where outgassing seems to be very low. We estimate that the outgassing pattern can be represented by a Gaussian distribution in a solid angle with FWHM ≈ 80°. 出版者： EDP Sciences 出版日期： 2015-11-01 出處： Astronomy & Astrophysics, 2015-11, Vol.583, p.A3- 資源來源： EDP Sciences 版權： licence_http://creativecommons.org/publicdomain/zero 識別號： ISSN: 0004-6361 識別號： ISSN: 1432-0746 識別號： EISSN: 1432-0746 識別號： DOI: 10.1051/0004-6361/201526094
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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