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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
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017-07-01
卷号468期号:3页码:2897-2909
DOI10.1093/mnras/stw2227
产权排序第3完成单位
收录类别SCI
关键词comets: general Kuiper belt: general minor planets, asteroids:individual: 315898 minor planets, asteroids: individual: 342842 planets asteroids: individual: 382004 radio lines: general
摘要

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.

资助项目Jansky Fellowship of the National Radio Astronomy Observatory ; UCLA ; NASA's Origins programme ; NSF[AST-0540882]
项目资助者Jansky Fellowship of the National Radio Astronomy Observatory ; UCLA ; NASA's Origins programme ; NSF(AST-0540882)
语种英语
学科领域天文学 ; 太阳与太阳系 ; 行星物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS记录号WOS:000402808700032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]COMET HALE-BOPP ; KUIPER-BELT OBJECTS ; CARBON-MONOXIDE ; 103P/HARTLEY 2 ; 29P/SCHWASSMANN-WACHMANN 1 ; OUTBURST ACTIVITY ; HERSCHEL-PACS ; NUCLEI ; SPECTROSCOPY ; TEMPERATURE
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/10088
专题其他
通讯作者Drahus, Michal
作者单位1.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
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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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