Star formation time-scale in the molecular filament WB 673
文献类型：期刊论文
| 作者 | Ryabukhina, O. L.4; Kirsanova, M. S.4; Henkel, C.1,2,3; Wiebe, D. S.4 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2022-11-03 |
| 卷号 | 517期号:4页码:4669-4678 |
| ISSN号 | 0035-8711 |
| 关键词 | stars: formation ISM: clouds ISM: individual objects (WB89 673, S233-IR) ISM: molecules |
| DOI | 10.1093/mnras/stac2877 |
| 通讯作者 | Ryabukhina, O. L.(ryabukhina@ipfran.ru) |
| 英文摘要 | We present the observations of ammonia emission lines toward the interstellar filament WB 673 hosting the dense clumps WB 673, WB 668, S233-IR, and G173.57+2.43. LTE analysis of the lines allows us to estimate gas kinetic temperature (less than or similar to 30K in all the clumps), number density (7-17 x 10(3) cm(-3)), and ammonia column density (approximate to 1-1.5 x 10(15) cm(-2)) in the dense clumps. We find signatures of collapse in WB 673 and presence of compact spatially unresolved dense clumps in S233-IR. We reconstruct 1D density and temperature distributions in the clumps and estimate their ages using astrochemical modelling. Considering CO, CS, NH3, and N2H+ molecules (plus HCN and HNC for WB 673), we find a chemical age of t(chem )= 1-3 x 10(5) yrs, providing the best agreement between the simulated and observed column densities in all the clumps. Therefore, we consider t(chem) as the chemical age of the entire filament. A long preceding low-density stage of gas accumulation in the astrochemical model would break the agreement between the simulated and observed column densities. We suggest that rapid star formation over a similar to 10(5) yrs time-scale take place in the filament. |
| WOS关键词 | INFRARED SURVEY ; CLOUDS ; NH3 ; EVOLUTION ; EMISSION ; AMMONIA ; CORES ; MULTIWAVELENGTH ; ANOMALIES ; CLUSTERS |
| 资助项目 | Russian Foundation for Basic Research (RFBR)[20-32-90102] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000878763600001 |
| 资助机构 | Russian Foundation for Basic Research (RFBR) |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4947]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Ryabukhina, O. L. |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 3.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 4.Russian Acad Sci, Inst Astron, 48 Pyatnitskaya Str, Moscow 119017, Russia |
| 推荐引用方式 GB/T 7714 | Ryabukhina, O. L.,Kirsanova, M. S.,Henkel, C.,et al. Star formation time-scale in the molecular filament WB 673[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,517(4):4669-4678. |
| APA | Ryabukhina, O. L.,Kirsanova, M. S.,Henkel, C.,&Wiebe, D. S..(2022).Star formation time-scale in the molecular filament WB 673.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,517(4),4669-4678. |
| MLA | Ryabukhina, O. L.,et al."Star formation time-scale in the molecular filament WB 673".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 517.4(2022):4669-4678. |
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