A multiwavelength study of filamentary cloud G341.244-00.265
文献类型：期刊论文
| 作者 | Yu, Nai-Ping; Xu, Jing-Long; Wang, Jun-Jie |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2019-02-13 |
| 卷号 | 622页码:10 |
| 关键词 | stars: formation ISM: clouds ISM: abundances stars: protostars |
| ISSN号 | 1432-0746 |
| DOI | 10.1051/0004-6361/201832962 |
| 英文摘要 | We present a multiwavelength study toward the filamentary molecular cloud G341.244-00.265, to investigate the physical and chemical properties, as well as star formation activities taking place therein. Our radio continuum and molecular line data were obtained from the Sydney University Molonglo Sky Survey (SUMSS), Atacama Pathfinder Experiment Telescope Large Area Survey of the Galaxy (ATLASGAL), Structure, excitation, and dynamics of the inner Galactic interstellar medium (SEDIGISM) and Millimeter Astronomy Legacy Team Survey at 90 GHz (MALT90). The infrared archival data come from Galactic Legacy Infrared Midplane Survey Extraordinaire (GLIMPSE), Wide-field Infrared Survey Explorer (WISE), and Herschel InfraRed Galactic Plane Survey (Hi-GAL). G341.244-00.265 displays an elongated filamentary structure both in far-infrared and molecular line emissions; the "head" and "tail" of this molecular cloud are associated with known infrared bubbles S21, S22, and S24. We made H-2 column density and dust temperature maps of this region by the spectral energy distribution (SED) method. G341.244-00.265 has a linear mass density of about 1654 M-circle dot pc(-1) and has a projected length of 11.1 pc. The cloud is prone to collapse based on the virial analysis. Even though the interactions between this filamentary cloud and its surrounding bubbles are evident, we found these bubbles are too young to trigger the next generation of star formation in G341.244-00.265. From the ATLASGAL catalog, we found eight dense massive clumps associated with this filamentary cloud. All of these clumps have sufficient mass to form massive stars. Using data from the GLIMPSE and WISE survey, we search the young stellar objects (YSOs) in G341.244-00.265. We found an age gradient of star formation in this filamentary cloud: most of the YSOs distributed in the center are Class I sources, while most Class II candidates are located in the head and tail of G341.244-00.265, indicating star formation at the two ends of this filament is prior to the center. The abundance ratio of N(N2H+)/N((CO)-O-18) is higher in the center than that in the two ends, also indicating that the gas in the center is less evolved. Taking into account the distributions of YSOs and the N(N2H+)/N(C18O) ratio map, our study is in agreement with the prediction of the so-called "end-dominated collapse" star formation scenario. |
| WOS关键词 | MASSIVE STARS ; DARK CLOUDS ; EVOLUTION ; CHEMISTRY ; OBJECTS |
| 资助项目 | Commonwealth of Australia ; National Natural Science Foundation of China[11503037] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000458472100001 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/24942]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Yu, Nai-Ping |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Nai-Ping,Xu, Jing-Long,Wang, Jun-Jie. A multiwavelength study of filamentary cloud G341.244-00.265[J]. ASTRONOMY & ASTROPHYSICS,2019,622:10. |
| APA | Yu, Nai-Ping,Xu, Jing-Long,&Wang, Jun-Jie.(2019).A multiwavelength study of filamentary cloud G341.244-00.265.ASTRONOMY & ASTROPHYSICS,622,10. |
| MLA | Yu, Nai-Ping,et al."A multiwavelength study of filamentary cloud G341.244-00.265".ASTRONOMY & ASTROPHYSICS 622(2019):10. |
入库方式： OAI收割
来源：国家天文台
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