Submillimeter observations of molecular gas interacting with the supernova remnant W28
文献类型：期刊论文
| 作者 | Mazumdar, Parichay3; Tram, Le Ngoc3; Wyrowski, Friedrich3; Menten, Karl M.3; Tang, Xindi1,2,3
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2022-12-21 |
| 卷号 | 668页码:18 |
| ISSN号 | 0004-6361 |
| 关键词 | ISM: supernova remnants submillimeter: ISM molecular data |
| DOI | 10.1051/0004-6361/202037564 |
| 通讯作者 | Mazumdar, Parichay(pmazumdar@mpifr-bonn.mpg.de) |
| 英文摘要 | Context. Supernovae (SNe) inject large amounts of energy and chemically enriched materials into their surrounding interstellar medium and, in some instances, into molecular clouds (MCs). The interaction of a supernova remnant (SNR) with a MC plays a crucial role in the evolution of the cloud's physical and chemical properties. Despite their importance, only a handful of studies have been made addressing the molecular richness in molecular clouds impacted by SNRs. (Sub)millimter wavelength observations of MCs affected by SNRs can be used to build a census of their molecular richness, which in turn can motivate various chemical and physical models aimed at explaining the chemical evolution of the clouds. Aims. We carried out multi-molecule and multi-transition observations toward the molecular region F abutting the SNR W28, containing 1720 MHz OH masers, well-established tracers of SNR-MC interactions. We used the detected lines to constrain the physical conditions of this region. Methods. We used the APEX Telescope to observe molecular lines in the frequency range 213-374 GHz. We used non-local thermodynamic equilibrium (non-LTE) RADEX modeling to interpret the observational data. Results. We detected emission from multiple molecular species in the region, namely CH3OH, H2CO, SO, SiO, CN, CCH, NO, CS, HCO+, HCN, HNC, N2H+, CO, and from the isotopologues of some of them. We report the first detection of thermally excited (non-maser) CH3OH emission toward a SNR. Employing non-LTE RADEX modeling of multiple H2CO and CH3 OH lines, we constrained the kinetic temperature and spatial density in the molecular gas. The gas kinetic temperatures range from 60 to 100 K while the spatial density of the gas ranges from 9 x 10(5) to 5 x 10(6) cm(-3). We obtained an ortho-para ratio similar to 2 for H2CO, which indicates that formaldehyde is most likely formed on dust grain surfaces and not in the gas phase. Conclusions. Our results show that molecules as complex as H2CO and CH3OH can be detected in SNR-MC interactions. This could motivate chemical modeling to explore their formation pathways. |
| WOS关键词 | STAR-FORMING REGIONS ; GAMMA-RAY EMISSION ; PHYSICAL CONDITIONS ; CO OBSERVATIONS ; OH MASERS ; MAGNETOHYDRODYNAMIC SHOCKS ; INTERSTELLAR CLOUDS ; FORMALDEHYDE ORTHO ; PARA RATIO ; H-I |
| 资助项目 | Deutsche Forschungsgemeinschaft (DFG) ; Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; National Natural Science Foundation of China[11903070] ; National Natural Science Foundation of China[11433008] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000901811800003 |
| 资助机构 | Deutsche Forschungsgemeinschaft (DFG) ; Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5038]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Mazumdar, Parichay |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Radio Astron, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.Max Planck Inst Radioastron, Auf dem Hugel 69, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Mazumdar, Parichay,Tram, Le Ngoc,Wyrowski, Friedrich,et al. Submillimeter observations of molecular gas interacting with the supernova remnant W28[J]. ASTRONOMY & ASTROPHYSICS,2022,668:18. |
| APA | Mazumdar, Parichay,Tram, Le Ngoc,Wyrowski, Friedrich,Menten, Karl M.,&Tang, Xindi.(2022).Submillimeter observations of molecular gas interacting with the supernova remnant W28.ASTRONOMY & ASTROPHYSICS,668,18. |
| MLA | Mazumdar, Parichay,et al."Submillimeter observations of molecular gas interacting with the supernova remnant W28".ASTRONOMY & ASTROPHYSICS 668(2022):18. |
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来源：新疆天文台
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