The 107 GHz Methanol Transition Is a Dasar in G0.253+0.016
文献类型：期刊论文
| 作者 | Bulatek, Alyssa2; Ginsburg, Adam2; Darling, Jeremy3; Henkel, Christian1,4,5 ; Menten, Karl M.4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2023-10-01 |
| 卷号 | 956期号:2页码:78 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/acf0c1 |
| 产权排序 | 5 |
| 英文摘要 | We present observations of population anti-inversion in the 31 - 40 A + transition of CH3OH (methanol) at 107.013831 GHz toward the Galactic center cloud G0.253+0.016 ("The Brick"). Anti-inversion of molecular level populations can result in absorption lines against the cosmic microwave background (CMB) in a phenomenon known as a "dasar." We model the physical conditions under which the 107 GHz methanol transition dases and determine that dasing occurs at densities below 106 cm-3 and column densities between 1013 and 1016 cm-2. We also find that for this transition, dasing does not strongly depend on the gas kinetic temperature. We evaluate the potential of this tool for future deep galaxy surveys. We note that other works have already reported absorption in this transition (e.g., in NGC 253), but we provide the first definitive evidence that it is absorption against the CMB rather than against undetected continuum sources. |
| WOS关键词 | STAR-FORMATION ; FORMALDEHYDE DENSITOMETRY ; INTERSTELLAR H2CO ; ANTI-INVERSION ; ABSORPTION ; LINE ; ASTROPY ; PROJECT ; MASERS ; DISTANCE |
| 资助项目 | NSF[AST 2008101] ; NSF[2206511] ; NSF[CAREER 2142300] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001081057300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | NSF |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5543]  |
| 专题 | 研究单元未命名 恒星形成与演化研究团组 |
| 通讯作者 | Bulatek, Alyssa |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Univ Florida, Dept Astron, POB 112055, Gainesville, FL 32611 USA 3.Univ Colorado, Ctr Astrophys & Space Astron, Dept Astrophys & Planetary Sci, 389 UCB, Boulder, CO 80309, Afghanistan 4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 5.King Abdulaziz Univ, Fac Sci, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia |
| 推荐引用方式 GB/T 7714 | Bulatek, Alyssa,Ginsburg, Adam,Darling, Jeremy,et al. The 107 GHz Methanol Transition Is a Dasar in G0.253+0.016[J]. ASTROPHYSICAL JOURNAL,2023,956(2):78. |
| APA | Bulatek, Alyssa,Ginsburg, Adam,Darling, Jeremy,Henkel, Christian,&Menten, Karl M..(2023).The 107 GHz Methanol Transition Is a Dasar in G0.253+0.016.ASTROPHYSICAL JOURNAL,956(2),78. |
| MLA | Bulatek, Alyssa,et al."The 107 GHz Methanol Transition Is a Dasar in G0.253+0.016".ASTROPHYSICAL JOURNAL 956.2(2023):78. |
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