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New limits to CO outgassing in Centaurs
Drahus, Michal1; Yang B(杨彬)2,3; Lis, Dariusz C.4,5; Jewitt, David6,7
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017-07-01
Volume468Issue:3Pages:2897-2909
DOI10.1093/mnras/stw2227
Contribution Rank第3完成单位
Indexed BySCI
Keywordcomets: general Kuiper belt: general minor planets, asteroids:individual: 315898 minor planets, asteroids: individual: 342842 planets asteroids: individual: 382004 radio lines: general
Abstract

Centaurs are small Solar system objects orbiting between Jupiter and Neptune. They are widely believed to be escapees from the trans-Neptunian region on their way to become Jupiter-family comets. Indeed, some Centaurs exhibit the characteristic cometary appearance. The sublimation of carbon monoxide has been proposed as a driver of activity in distant comets, but no strong detection of gaseous CO in a Centaur other than 29P/Schwassmann-Wachmann 1 has been reported to date. Here we report the results of a deep search for CO outgassing in three Centaurs: (315898), (342842), and (382004). Our survey was carried out using the Caltech Submillimeter Observatory on nine nights in late 2011. The targeted rotational line J(2-1) of CO is undetected in all three objects in spite of high instrumental sensitivity. We find the model-dependent 3 sigma upper limits to the CO production rate of 2.13 x 10(27) molecules s(-1) for (315898), 1.32 x 10(27) molecules s(-1) for (342842), and 1.17 x 10(27) molecules s(-1) for (382004), which are among the most sensitive obtained to date. These upper limits are consistently analysed in the context of published CO data of 14 Centaurs and one well-observed long-period comet, C/1995 O1 (Hale-Bopp), and support an earlier suggestion that the surfaces of most Centaurs are not dominated by exposed CO ice.

Funding ProjectJansky Fellowship of the National Radio Astronomy Observatory ; UCLA ; NASA's Origins programme ; NSF[AST-0540882]
Funding OrganizationJansky Fellowship of the National Radio Astronomy Observatory ; UCLA ; NASA's Origins programme ; NSF(AST-0540882)
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 行星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000402808700032
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCOMET HALE-BOPP ; KUIPER-BELT OBJECTS ; CARBON-MONOXIDE ; 103P/HARTLEY 2 ; 29P/SCHWASSMANN-WACHMANN 1 ; OUTBURST ACTIVITY ; HERSCHEL-PACS ; NUCLEI ; SPECTROSCOPY ; TEMPERATURE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10088
Collection其他
Corresponding AuthorDrahus, Michal
Affiliation1.Astronomical Observatory, Jagiellonian University, ul. Orla 171, 30-244 Krak´ow, Poland
2.European Southern Observatory, Alonso de C´ordova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile
3.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, Yunnan, China
4.LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universit´es, UPMC Univ. Paris 06, 61 Avenue de l’Observatoire, 75014 Paris, France
5.Division of Physics, Mathematics and Astronomy, California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125, USA
6.Department of Earth, Planetary and Space Sciences, University of California at Los Angeles, 595 Charles E Young Dr E, Los Angeles, CA 90095, USA
7.Department of Physics and Astronomy, University of California at Los Angeles, 475 Portola Plaza, Los Angeles, CA 90095, USA
Recommended Citation
GB/T 7714
Drahus, Michal,Yang B,Lis, Dariusz C.,et al. New limits to CO outgassing in Centaurs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(3):2897-2909.
APA Drahus, Michal,Yang B,Lis, Dariusz C.,&Jewitt, David.(2017).New limits to CO outgassing in Centaurs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(3),2897-2909.
MLA Drahus, Michal,et al."New limits to CO outgassing in Centaurs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.3(2017):2897-2909.
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