Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI
文献类型：期刊论文
| 作者 | Huang, K. -y.20; Viti, S.19,20; Holdship, J.19,20; Mangum, J. G.18; Martin, S.16,17; Harada, N.13,14,15; Muller, S.12; Sakamoto, K.14; Tanaka, K.11; Yoshimura, Y.10 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2023-07-14 |
| 卷号 | 675页码:32 |
| ISSN号 | 0004-6361 |
| 关键词 | galaxies: ISM galaxies: individual: NGC253 astrochemistry galaxies: starburst ISM: molecules |
| DOI | 10.1051/0004-6361/202245659 |
| 通讯作者 | Huang, K. -y.(kyhuang@strw.leidenuniv.nl) |
| 英文摘要 | Context. HNCO and SiO are well-known shock tracers and have been observed in nearby galaxies, including the nearby (D = 3.5 Mpc) starburst galaxy NGC 253. The simultaneous detection of these two species in regions where the star-formation rate is high may be used to study the shock history of the gas.Aims. We perform a multi-line molecular study of NGC 253 using the shock tracers SiO and HNCO and aim to characterize its gas properties. We also explore the possibility of reconstructing the shock history in the central molecular zone (CMZ) of the galaxy.Methods. Six SiO transitions and eleven HNCO transitions were imaged at high resolution 1'.'6 (28 pc) with the Atacama Large Millimeter/submillimeter Array (ALMA) as part of the ALCHEMI Large Programme. Both non local thermaldynamic equilibrium (non-LTE) radiative transfer analysis and chemical modeling were performed in order to characterize the gas properties and investigate the chemical origin of the emission.Results. The nonLTE radiative transfer analysis coupled with Bayesian inference shows clear evidence that the gas traced by SiO has different densities and temperatures than that traced by HNCO, with an indication that shocks are needed to produce both species. Chemical modeling further confirms such a scenario and suggests that fast and slow shocks are responsible for SiO and HNCO production, respectively, in most GMCs. We are also able to infer the physical characteristics of the shocks traced by SiO and HNCO for each GMC.Conclusions. Radiative transfer and chemical analysis of the SiO and HNCO in the CMZ of NGC 253 reveal a complex picture whereby most of the GMCs are subjected to shocks. We speculate on the possible shock scenarios responsible for the observed emission and provide potential history and timescales for each shock scenario. Observations of higher spatial resolution for these two species are required in order to quantitatively differentiate between the possible scenarios. |
| WOS关键词 | SPATIALLY-RESOLVED CHEMISTRY ; COMPLEX ORGANIC-MOLECULES ; SUPER STAR-CLUSTERS ; GALACTIC-CENTER ; LINE EMISSION ; CHANDRA OBSERVATIONS ; STARBURST GALAXIES ; ALMA OBSERVATIONS ; COLOGNE DATABASE ; SIO EMISSION |
| 资助项目 | European Research Council (ERC) ; Spanish Ministerio de Ciencia e Innovacin ; European ALMA Regional Center node in the Netherlands ; Spanish grant - MCIN/AEI ; [833460.vii] ; [PID2019-106027GA-C44] ; [PID2019-105552RB-C41] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:001034545500009 |
| 资助机构 | European Research Council (ERC) ; Spanish Ministerio de Ciencia e Innovacin ; European ALMA Regional Center node in the Netherlands ; Spanish grant - MCIN/AEI |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5374]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Huang, K. -y. |
| 作者单位 | 1.CSIC, Ctr Astrobiol, INTA, Ctra Torrejon Ajalvir Km 4, Madrid 28850, Spain 2.IGN, Observ Astron Nacl, Observ Madrid, Alfonso XII 3, Madrid 28014, Spain 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.King Abdulaziz Univ, Fac Sci, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 5.Max Planck Inst Radioastron, Auf dem Hugel 69, D-53121 Bonn, Germany 6.Univ Virginia, Dept Astron, POB 400325,530 McCormick Rd, Charlottesville, VA 22904 USA 7.Natl Radio Astron Observ, POB O,1003 Lopezville Rd, Socorro, NM 87801 USA 8.New Mexico Inst Min & Technol, 801 Leroy Pl, Socorro, NM 87801 USA 9.CSIC, Inst Space Sci ICE, Campus UAB, Barcelona 08193, Spain 10.Univ Tokyo, Inst Astron, Grad Sch Sci, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan |
| 推荐引用方式 GB/T 7714 | Huang, K. -y.,Viti, S.,Holdship, J.,et al. Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI[J]. ASTRONOMY & ASTROPHYSICS,2023,675:32. |
| APA | Huang, K. -y..,Viti, S..,Holdship, J..,Mangum, J. G..,Martin, S..,...&Bouvier, M..(2023).Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI.ASTRONOMY & ASTROPHYSICS,675,32. |
| MLA | Huang, K. -y.,et al."Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI".ASTRONOMY & ASTROPHYSICS 675(2023):32. |
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