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Evidence for Dense Gas Heated by the Explosion in Orion KL
Li, Dalei1,2; Tang, Xindi1,2; Henkel, Christian3,4; Menten, Karl M.3; Wyrowski, Friedrich3; Gong, Yan3; Wu, Gang1,2; He, Yuxin1,2; Esimbek, Jarken1,2; Zhou, Jianjun1,2
2020-09-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume901Issue:1Pages:62
Contribution Rank1
AbstractWe 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.
KeywordInterstellar medium Interstellar clouds
DOI10.3847/1538-4357/abae60
URL查看原文
Indexed BySCI
Language英语
WOS KeywordKINETIC TEMPERATURES ; MULTIPLE SYSTEM ; DYNAMICAL DECAY ; PROPER MOTIONS ; EMISSION ; AMMONIA
Funding ProjectCAS 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000575198700001
PublisherIOP PUBLISHING LTD
Funding OrganizationCAS 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
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3683
Collection射电天文研究室_恒星形成与演化研究团组
Corresponding AuthorTang, Xindi
Affiliation1.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.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
4.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
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.
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