Submillimeter Wave Astronomy Satellite observations of Comet 9P/Tempel 1 and Deep Impact

Autor:	Martin Harwit, Brian M. Patten, Volker Tolls, Gary J. Melnick, Ronald L. Snell, David A. Neufeld, F. Bensch
Rok vydání:	2006
Předmět:	Physics Solar System Astrophysics (astro-ph) Comet FOS: Physical sciences Astronomy Rotational transition Astronomy and Astrophysics Astrophysics Submillimetre astronomy Outgassing Impact crater Space and Planetary Science Comet nucleus Water vapor
Zdroj:	Icarus. 184:602-610
ISSN:	0019-1035
Popis:	On 4 July 2005 at 5:52 UT the Deep Impact mission successfully completed its goal to hit the nucleus of 9P/Tempel 1 with an impactor, forming a crater on the nucleus and ejecting material into the coma of the comet. NASA's Submillimeter Wave Astronomy Satellite (SWAS) observed the 1(10)-1(01) ortho-water ground-state rotational transition in comet 9P/Tempel 1 before, during, and after the impact. No excess emission from the impact was detected by SWAS and we derive an upper limit of 1.8e7 kg on the water ice evaporated by the impact. However, the water production rate of the comet showed large natural variations of more than a factor of three during the weeks before and after the impact. Episodes of increased activity with Q(H2O)~1e28 molecule/s alternated with periods with low outgassing (Q(H2O) Comment: 38 pages, 2 tables, 7 figures; Icarus, in press
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46f94ca0a1cba248da23ff09dbd6ecd3 https://doi.org/10.1016/j.icarus.2006.05.016 Zobrazit plný text záznamu Full Text from ScienceDirect