First extragalactic detection of a phosphorus-bearing molecule with ALCHEMI: Phosphorus nitride (PN)
文献类型：期刊论文
| 作者 | Haasler, D.16,17; Rivilla, V. M.15,16; Martin, S.13,14; Holdship, J.12,18; Viti, S.12,18; Harada, N.9,10,11; Mangum, J.8; Sakamoto, K.10; Muller, S.7; Tanaka, K.6 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2022-03-22 |
| 卷号 | 659页码:14 |
| 关键词 | astrochemistry galaxies individual NGC 253 ISM clouds ISM molecules ISM abundances |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202142032 |
| 通讯作者 | Haasler, D.(davidhaaslergarcia@gmail.com) |
| 英文摘要 | Context. Phosphorus (P) is a crucial element for life given its central role in several biomolecules. P-bearing molecules have been discovered in different regions of the Milky Way, but not yet towards an extragalactic environment. Aims. We searched for P-bearing molecules outside the Milky Way towards the nearby starburst Galaxy NGC 253. Methods. Using observations from the ALMA Comprehensive High-resolution Extragalactic Molecular Inventory (ALCHEMI) project, we used the MAdrid Data CUBe Analysis package to model the emission of P-bearing molecules assuming local thermodynamic equilibrium (LTE) conditions. We also performed a non-LTE analysis using SpectralRadex. Results. We report the detection of a P-bearing molecule, phosphorus nitride (PN), for the first time in an extragalactic environment, towards two giant molecular clouds (GMCs) of NGC 253. The LTE analysis yields total PN beam-averaged column densities N = (1.20 +/- 0.09) x 10(13) cm(-2) and N = (6.5 +/- 1.6) x 10(12) cm(-2), which translate into abundances with respect to H-2 of chi = (8.0 +/- 1.0) x 10(-12) and chi = (4.4 +/- 1.2) x 10(-12). We derived a low excitation temperature of T-ex = (4.4 +/- 1.3) K towards the GMC with the brightest PN emission, which indicates that PN is sub-thermally excited. The non-LTE analysis results in column densities consistent with the LTE values. We also searched for other P-bearing molecules (PO, PH3, CP, and CCP), and upper limits were derived. The derived PO/PN ratios are < 1.3 and < 1.7. The abundance ratio between PN and the shock-tracer SiO derived towards NGC 253 follows the same trend previously found towards Galactic sources. Conclusions. Comparison of the observations with chemical models indicates that the derived molecular abundances of PN in NGC 253 can be explained by shock-driven chemistry followed by cosmic-ray-driven photochemistry. |
| WOS关键词 | STAR-FORMING REGIONS ; NGC 253 ; INTERSTELLAR PN ; LINE SURVEY ; CHEMISTRY ; PO ; ALMA ; ORIGIN ; IDENTIFICATION ; SPECTROSCOPY |
| 资助项目 | Comunidad de Madrid through the Atraccion de Talento Investigador (Doctores con experiencia) Grant (COOL: Cosmic Origins Of Life)[2019-T1/TIC-15379] ; European Research Council (ERC)[MOPPEX 833460] ; JSPS KAKENHI[19K03937] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000771699100003 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Comunidad de Madrid through the Atraccion de Talento Investigador (Doctores con experiencia) Grant (COOL: Cosmic Origins Of Life) ; European Research Council (ERC) ; JSPS KAKENHI |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4590]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Haasler, D. |
| 作者单位 | 1.Natl Radio Astron Observ, Mitaka, Tokyo, Japan 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.King Abdulaziz Univ, Fac Sci, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 5.Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan 6.Keio Univ, Fac Sci & Technol, Dept Phys, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan 7.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden 8.Natl Radio Astron Observ, 520 Edgemt Rd, Charlottesville, VA 22903 USA 9.Grad Univ Adv Studies SOKENDAI, Sch Sci, Dept Astron, 2-21-1 Osawa, Mitaka, Tokyo 1811855, Japan 10.Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Math Bldg,1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan |
| 推荐引用方式 GB/T 7714 | Haasler, D.,Rivilla, V. M.,Martin, S.,et al. First extragalactic detection of a phosphorus-bearing molecule with ALCHEMI: Phosphorus nitride (PN)[J]. ASTRONOMY & ASTROPHYSICS,2022,659:14. |
| APA | Haasler, D..,Rivilla, V. M..,Martin, S..,Holdship, J..,Viti, S..,...&van der Werf, P..(2022).First extragalactic detection of a phosphorus-bearing molecule with ALCHEMI: Phosphorus nitride (PN).ASTRONOMY & ASTROPHYSICS,659,14. |
| MLA | Haasler, D.,et al."First extragalactic detection of a phosphorus-bearing molecule with ALCHEMI: Phosphorus nitride (PN)".ASTRONOMY & ASTROPHYSICS 659(2022):14. |
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