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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
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| 2020-09-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 901Issue:1Pages:62 |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | Interstellar medium Interstellar clouds |
| DOI | 10.3847/1538-4357/abae60 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | KINETIC TEMPERATURES ; MULTIPLE SYSTEM ; DYNAMICAL DECAY ; PROPER MOTIONS ; EMISSION ; AMMONIA |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000575198700001 |
| Publisher | IOP PUBLISHING LTD |
| Funding Organization | 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 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Tang, Xindi |
| Affiliation | 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.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 4.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang 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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| Li-2020-Evidence for（1083KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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