Sulfur-bearing Molecules in Orion KL

doi:10.3847/1538-4357/ab45ef

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	Sulfur-bearing Molecules in Orion KL
	Luo,Gan 1,2,3; Feng,Siyi 1,3,4; Li,Di 1,3,5; Qin,Sheng-Li 6; Peng,Yaping 7; Tang,Ningyu 1,3; Ren,Zhiyuan 1,3; Shi,Hui 1,3
刊名	The Astrophysical Journal
	2019-11-01
卷号	885 期号:1
关键词	ISM: abundances ISM: individual objects (Orion KL) ISM: molecules stars: formation
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab45ef
英文摘要	Abstract We present an observational study of the sulfur (S)-bearing species toward Orion KL at 1.3 mm by combining ALMA and IRAM-30 m single-dish data. At a linear resolution of ～800 au and a velocity resolution of 1 km s?1, we have identified 79 molecular lines from six S-bearing species. In these S-bearing species, we found a clear dichotomy between carbon–sulfur compounds and carbon-free S-bearing species for various characteristics, e.g., of line profiles, spatial morphology, and molecular abundances with respect to H2. Lines from the carbon–sulfur compounds (i.e., OCS, 13CS, and H2CS) exhibit spatial distributions concentrated around the continuum peaks and extended to the south ridge. The full width at half maximum (FWHM) linewidth of these molecular lines is in the range of 2 ～11 km s?1. The molecular abundances of OCS and H2CS decrease slightly from the cold (～68 K) to the hot (～176 K) regions. In contrast, lines from the carbon-free S-bearing species (i.e., SO2, 34SO, and H2S) are spatially more extended to the northeast of mm4, exhibiting broader FWHM line widths (15?～?26 km s?1). The molecular abundances of carbon-free S-bearing species increase by over an order of magnitude as the temperature increase from 50 to 100 K. In particular, 34SO/34SO2 and OCS/SO2 are enhanced from the warmer regions (>100 K) to the colder regions (～50 K). Such enhancements are consistent with the transformation of SO2 at warmer regions and the influence of shocks.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-885-1-AB45EF
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28613]
专题	中国科学院国家天文台
作者单位	1.National Astronomical Observatories, Chinese Academy of Science, Beijing 100101, People’s Republic of China; luogan@nao.cas.cn, siyi.s.feng@gmail.com, dili@nao.cas.cn 2.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 4.National Astronomical Observatory of Japan, 2 Chome-21-1 Osawa, Mitaka-shi, Tokyo-to 181-8588, Japan 5.Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa 6.Department of Astronomy, Yunnan University, and Key Laboratory of Astroparticle Physics of Yunnan Province, Kunming, 650091, People’s Republic of China slqin@bao.ac.cn 7.College of Science, Yunnan Agricultural University, Kunming, 650201, People’s Republic of China
推荐引用方式 GB/T 7714	Luo,Gan,Feng,Siyi,Li,Di,et al. Sulfur-bearing Molecules in Orion KL[J]. The Astrophysical Journal,2019,885(1).
APA	Luo,Gan.,Feng,Siyi.,Li,Di.,Qin,Sheng-Li.,Peng,Yaping.,...&Shi,Hui.(2019).Sulfur-bearing Molecules in Orion KL.The Astrophysical Journal,885(1).
MLA	Luo,Gan,et al."Sulfur-bearing Molecules in Orion KL".The Astrophysical Journal 885.1(2019).