High-resolution imaging of molecular outflows in massive young stars
文献类型：期刊论文
| 作者 | Qiu, Keping; Zhang, Qizhou; Beuther, Henrik; Yang, Ji
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2007 |
| 卷号 | 654期号:1页码:361-372 |
| 关键词 | ISM : individual (IRAS 18264-1152, IRAS 23151+5912) ISM : jets and outflows stars : formation |
| ISSN号 | 0004-637X |
| 英文摘要 | We present high angular resolution observations toward two massive star-forming regions, IRAS 18264 - 1152 and IRAS 23151+ 5912, with the Plateau de Bure Interferometer (PdBI) in the SiO(J = 2-1) and (HCO+)-C-13(J = 1-0) lines and at 1.3 and 3.4 mm continuum, and with the Very Large Array (VLA) in the NH3(J, K) (1, 1), (2, 2) lines. The NH3(1, 1) and (2, 2) emission is detected toward IRAS 18264 - 1152 only. For IRAS 18264 - 1152, the SiO observations reveal at least two quasi-perpendicular outflows with high collimation factors, and the most dominant feature is a redshifted jetlike outflow with very high velocities up to about Delta v = 60 km s(-1) with respect to the systemic velocity. The very high velocity component (Delta v = 22-60 km s(-1)) of this outflow is spatially offset from its high-velocity (Delta v = 3-21 km s(-1)) component. The SiO line profiles and position-velocity characteristics of these two components suggest that this outflow could be driven by an underlying precessing jet. For IRAS 23151+ 5912, the bipolar but mainly blueshifted SiO outflow coincides with the inner parts of the single-dish CO outflow. In particular, the quasi-parabolic shape of the blueshifted outflow coincides with the near-infrared nebulosity and is consistent with entrainment of the gas by an underlying wide-angle wind. The analysis of the molecular outflow data of the two luminous sources further supports high-mass stars forming via a disk-mediated accretion process similar to that in low-mass stars. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | PROTOSTELLAR CANDIDATES ; SIO EMISSION ; INTERSTELLAR AMMONIA ; MULTIPLE OUTFLOWS ; FORMATION REGIONS ; BIPOLAR OUTFLOWS ; STELLAR OBJECTS ; IRAS 20126+4104 ; CO OUTFLOWS ; CS EMISSION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000243221800025 |
| 公开日期 | 2012-02-04 |
| 源URL | [http://159.226.72.40/handle/332002/2344]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 2.Nanjing Univ, Dept Astron, Nanjing 210008, Peoples R China 3.Max Planck Inst Astron, D-69117 Heidelberg, Germany 4.Chinese Acad Sci, Purple Mt Observ, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Keping,Zhang, Qizhou,Beuther, Henrik,et al. High-resolution imaging of molecular outflows in massive young stars[J]. ASTROPHYSICAL JOURNAL,2007,654(1):361-372. |
| APA | Qiu, Keping,Zhang, Qizhou,Beuther, Henrik,&Yang, Ji.(2007).High-resolution imaging of molecular outflows in massive young stars.ASTROPHYSICAL JOURNAL,654(1),361-372. |
| MLA | Qiu, Keping,et al."High-resolution imaging of molecular outflows in massive young stars".ASTROPHYSICAL JOURNAL 654.1(2007):361-372. |
入库方式： OAI收割
来源：紫金山天文台
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