A ring system detected around the Centaur (10199) Chariklo

	A ring system detected around the Centaur (10199) Chariklo
	Braga-Ribas, F.; Sicardy, B.; Ortiz, J.L.; Snodgrass, C.; Roques, F.; Vieira-Martins, R.; Camargo, J.I.B.; Assafin, M.; Duffard, R.; Jehin, E.
刊名	NATURE
	2014-04-03
卷号	508 期号:7494 页码:72-75
ISSN号	0028-0836
通讯作者	Braga-Ribas, F (reprint author), MCTI, Observatorio Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.
产权排序	第二十五完成单位
英文摘要	Hitherto, rings have been found exclusively around the four giant planets in the Solar System(1). Rings are natural laboratories in which to study dynamical processes analogous to those that take place during the formation of planetary systems and galaxies. Their presence also tells us about the origin and evolution of the body they encircle. Here we report observations of a multichord stellar occultation that revealed the presence of a ring system around (10199) Chariklo, which is a Centaur-that is, one of a class of small objects orbiting primarily between Jupiter and Neptune-with an equivalent radius of 124 +/- 9 kilometres (ref. 2). There are two dense rings, with respective widths of about 7 and 3 kilometres, optical depths of 0.4 and 0.06, and orbital radii of 391 and 405 kilometres. The present orientation of the ring is consistent with an edge-on geometry in 2008, which provides a simple explanation for the dimming(3) of the Chariklo system between 1997 and 2008, and for the gradual disappearance of ice and other absorption features in its spectrum over the same period(4,5). This implies that the rings are partly composed of water ice. They may be the remnants of a debris disk, possibly confined by embedded, kilometre-sized satellites.
学科主题	Science & Technology - Other Topics
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	TRANS-NEPTUNIAN OBJECTS ; STELLAR OCCULTATION ; ALBEDO ; PHOTOMETRY ; EVOLUTION ; CHIRON ; REGION ; ORIGIN
收录类别	SCI ; EI
原文出处	http://www.nature.com/nature/journal/v508/n7494/full/nature13155.html
语种	英语
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6804]
专题	云南天文台_系外行星研究组
推荐引用方式 GB/T 7714	Braga-Ribas, F.,Sicardy, B.,Ortiz, J.L.,et al. A ring system detected around the Centaur (10199) Chariklo[J]. NATURE,2014,508(7494):72-75.
APA	Braga-Ribas, F..,Sicardy, B..,Ortiz, J.L..,Snodgrass, C..,Roques, F..,...&Lambas, D.G..(2014).A ring system detected around the Centaur (10199) Chariklo.NATURE,508(7494),72-75.
MLA	Braga-Ribas, F.,et al."A ring system detected around the Centaur (10199) Chariklo".NATURE 508.7494(2014):72-75.