Molecular isotopologue measurements toward super star clusters and the relation to their ages in NGC 253 with ALCHEMI
文献类型：期刊论文
| 作者 | Butterworth, J.6; Viti, S.6; Van der Werf, P. P.6; Mangum, J. G.14; Martin, S.15,16; Harada, N.17,19,21; Emig, K. L.14; Muller, S.20; Sakamoto, K.17,19; Yoshimura, Y.18 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2024-05-28 |
| 卷号 | 686页码:A31 |
| 关键词 | astrochemistry ISM: molecules galaxies: active galaxies: ISM galaxies: starburst |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202348787 |
| 产权排序 | 16 |
| 英文摘要 | Context. Determining the evolution of the CNO isotopes in the interstellar medium (ISM) of starburst galaxies can yield important constraints on the ages of super star clusters (SSCs), or on other aspects and factors contributing to their evolution, such as the initial mass function (IMF). Due to the time-dependent nature of the abundances of isotopes within the ISM - as they are supplied from processes such as nucleosynthesis or chemical fractionation -, this provides the opportunity to test whether or not isotope ratios trace the ages of highly star-forming regions, such as SSCs. Aims. The goal of this study is to investigate whether the isotopic variations in SSC regions within NGC 253 are correlated with their different ages as derived from stellar population modelling. Methods. We measured abundance ratios of CO, HCN, and HCO+ isotopologues in six regions containing SSCs within NGC 253 using high-spatial-resolution (1.6 '', similar to 28 pc) data from the ALCHEMI (ALma Comprehensive High-resolution Extragalactic Molecular Inventory) ALMA Large program. We then analysed these ratios using RADEX radiative transfer modelling, with the parameter space sampled using the nested sampling Monte Carlo algorithm MLFriends. These abundance ratios were then compared to ages predicted in each region via the fitting of observed star-formation tracers (such as Br gamma) to Starburst99 starburst stellar population evolution models. Results. We determined the isotopic column density ratios across multiple regions of SSC activity in NGC 253 using non-LTE radiative transfer modelling. We do not find any significant trend with age for the CO and HCN isotopologue ratios on timescales of the ages of the SSC* regions observed. However, HCO+ may show a correlation with age over these timescales in C-12/C-13. Conclusions. The driving factors of these ratios within SSCs could be the IMF or fractionation effects. To further probe these effects in SSCs over time, a larger sample of SSCs must be observed spanning a larger age range. |
| WOS关键词 | SUB-DOPPLER MEASUREMENTS ; MILLIMETER-WAVE OBSERVATIONS ; LUMINOUS INFRARED GALAXIES ; GALACTIC C-12/C-13 RATIOS ; ROTATIONAL SPECTRUM ; DENSE-GAS ; INTERSTELLAR-MEDIUM ; NITROGEN FRACTIONATION ; INITIAL CONDITIONS ; CENTRAL STARBURST |
| 资助项目 | European Research Council (ERC) ; MCIN/AEI[PID2019-105552RB-C41] ; Consejo Superior de Investigaciones Cientificas (CSIC) ; Centro de Astrobiologia (CAB)[833460] ; [RYC2020-029387-I] ; [20225AT015] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001233655700010 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | European Research Council (ERC) ; MCIN/AEI ; Consejo Superior de Investigaciones Cientificas (CSIC) ; Centro de Astrobiologia (CAB) |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6766]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Butterworth, J. |
| 作者单位 | 1.Keio Univ, Fac Sci & Technol, Dept Phys, 3-14-1 Hiyoshi, Yokohama, Kanagawa 2238522, Japan 2.CSIC, Inst Space Sci ICE, Campus UAB,Carrer Magrans, Barcelona 08193, Spain 3.Ctr Astrobiol CAB, CSIC INTA, Ctra Torrejon Ajalvir Km 4, Torrejon De Ardoz 28850, Madrid, Spain 4.Univ Virginia, Dept Astron, POB 400325,530 McCormick Rd, Charlottesville, VA 22904 USA 5.Max Planck Inst Radioastron, Auf-dem-Hugel 69, D-53121 Bonn, Germany 6.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands 7.Univ British Columbia, Dept Phys & Astron, 6225 Agr Rd, Vancouver, BC V6T 1Z1, Canada 8.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 9.Tech Univ Denmark, DTU Space, Elektrovej 327, DK-2800 Lyngby, Denmark 10.Cosm Dawn Ctr DAWN, Copenhagen, Denmark |
| 推荐引用方式 GB/T 7714 | Butterworth, J.,Viti, S.,Van der Werf, P. P.,et al. Molecular isotopologue measurements toward super star clusters and the relation to their ages in NGC 253 with ALCHEMI[J]. ASTRONOMY & ASTROPHYSICS,2024,686:A31. |
| APA | Butterworth, J..,Viti, S..,Van der Werf, P. P..,Mangum, J. G..,Martin, S..,...&Zhou, D..(2024).Molecular isotopologue measurements toward super star clusters and the relation to their ages in NGC 253 with ALCHEMI.ASTRONOMY & ASTROPHYSICS,686,A31. |
| MLA | Butterworth, J.,et al."Molecular isotopologue measurements toward super star clusters and the relation to their ages in NGC 253 with ALCHEMI".ASTRONOMY & ASTROPHYSICS 686(2024):A31. |
入库方式： OAI收割
来源：新疆天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。