Evidence for Dense Gas Heated by the Explosion in Orion KL

doi:10.3847/1538-4357/abae60

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	Evidence for Dense Gas Heated by the Explosion in Orion KL
	Li, Dalei 1,2; Tang, Xindi 1,2; Henkel, Christian 3,4; Menten, Karl M.4; Wyrowski, Friedrich 4; Gong, Yan 4; Wu, Gang 1,2; He, Yuxin 1,2; Esimbek, Jarken 1,2; Zhou, Jianjun 1,2
刊名	ASTROPHYSICAL JOURNAL
	2020-09-01
卷号	901 期号:1 页码:62
关键词	Interstellar medium Interstellar clouds
ISSN号	0004-637X
DOI	10.3847/1538-4357/abae60
产权排序	1
英文摘要	We mapped the kinetic temperature structure of Orion KL in a similar to 20 '' (similar to 8000 au) sized region with para-H2CS 7(07) - 6(06), 7(26) - 6(25), and 7(25) - 6(24)making use of Atacama Large Millimeter/submillimeter Array Band 6 Science Verification data. The kinetic temperatures obtained with a resolution of 165 x 114 (similar to 550 au) are deduced by modeling the measured averaged velocity-integrated intensity ratios of para-H2CS 7(26) - 6(25)/7(07) - 6(06)and 7(25) - 6(24)/7(07) - 6(06)with a RADEX non-LTE model. The kinetic temperatures of the dense gas, derived from the para-H2CS line ratios at a spatial density of 10(7)cm(-3), are high, ranging from 43 to >500 K with an unweighted average of similar to 170 K. There is no evidence for internal sources playing an important role in the heating of the various structures identified in previous work, namely the elongated ridge, the northwestern clump, and the eastern region of the compact ridge, while the high temperatures in the western region of the compact ridge may be dominated by internal massive star formation. Significant gradients of kinetic temperature along molecular filaments traced by H2CS indicate that the dense gas is heated by the shocks induced by the enigmatic explosive event which occurred several hundred years ago and greatly affected the energetics of the Orion KL region. Thus, with the notable exception of the western region of the compact ridge, the high temperatures of the dense gas in Orion KL are probably caused by shocks from the explosive event, leading to a dominant component of externally heated dense gas.
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资助项目	CAS Light of West China Program[2016-QNXZ-B-23] ; National Natural Science foundation of China[11703074] ; National Natural Science foundation of China[11903070] ; National Natural Science foundation of China[11433008] ; National Natural Science foundation of China[11703073] ; National Natural Science foundation of China[11973076] ; TianShan Youth Plan[2018Q084] ; Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; Collaborative Research Council 956 ; Deutsche Forschungsgemeinschaft (DFG) ; Chinese Academy of Sciences President's International Fellowship Initiative[2021VMA0009] ; Youth Innovation Promotion Association CAS
WOS关键词	KINETIC TEMPERATURES ; MULTIPLE SYSTEM ; DYNAMICAL DECAY ; PROPER MOTIONS ; EMISSION ; AMMONIA
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000575198700001
资助机构	CAS Light of West China Program ; National Natural Science foundation of China ; TianShan Youth Plan ; Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; Collaborative Research Council 956 ; Deutsche Forschungsgemeinschaft (DFG) ; Chinese Academy of Sciences President's International Fellowship Initiative ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3682]
专题	恒星形成与演化研究团组
通讯作者	Tang, Xindi
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 3.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
推荐引用方式 GB/T 7714	Li, Dalei,Tang, Xindi,Henkel, Christian,et al. Evidence for Dense Gas Heated by the Explosion in Orion KL[J]. ASTROPHYSICAL JOURNAL,2020,901(1):62.
APA	Li, Dalei.,Tang, Xindi.,Henkel, Christian.,Menten, Karl M..,Wyrowski, Friedrich.,...&Zhou, Jianjun.(2020).Evidence for Dense Gas Heated by the Explosion in Orion KL.ASTROPHYSICAL JOURNAL,901(1),62.
MLA	Li, Dalei,et al."Evidence for Dense Gas Heated by the Explosion in Orion KL".ASTROPHYSICAL JOURNAL 901.1(2020):62.