KMS of Xinjiang Astronomical Observatory, CAS
| Star formation time-scale in the molecular filament WB 673 | |
Ryabukhina, O. L.1; Kirsanova, M. S.1; Henkel, C.2,3,4 ; Wiebe, D. S.1
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| 2022-11-03 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| ISSN | 0035-8711 |
| Volume | 517Issue:4Pages:4669-4678 |
| Contribution Rank | 4 |
| Abstract | 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. |
| Keyword | stars: formation ISM: clouds ISM: individual objects (WB89 673, S233-IR) ISM: molecules |
| DOI | 10.1093/mnras/stac2877 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | INFRARED SURVEY ; CLOUDS ; NH3 ; EVOLUTION ; EMISSION ; AMMONIA ; CORES ; MULTIWAVELENGTH ; ANOMALIES ; CLUSTERS |
| Funding Project | Russian Foundation for Basic Research (RFBR)[20-32-90102] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000878763600001 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | Russian Foundation for Basic Research (RFBR) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4948 |
| Collection | 中国科学院新疆天文台 射电天文研究室_恒星形成与演化研究团组 |
| Corresponding Author | Ryabukhina, O. L. |
| Affiliation | 1.Russian Acad Sci, Inst Astron, 48 Pyatnitskaya Str, Moscow 119017, Russia 2.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 3.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| Recommended Citation 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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| Ryabukhina-2022-Star（1702KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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