EARLY PHASE OF MASSIVE STAR FORMATION: A CASE STUDY OF THE INFRARED DARK CLOUD G084.81-01.09
文献类型：期刊论文
| 作者 | Zhang, S. B.1,2; Yang, J.1,2 ; Xu, Y.1,2; Pandian, J. D.3; Menten, K. M.4; Henkel, C.4
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| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
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| 出版日期 | 2011-03-01 |
| 卷号 | 193期号:1页码:10(14pp) |
| 关键词 | ISM: individual objects (G084.81-01.09) ISM: kinematics and dynamics ISM: molecules stars: formation |
| ISSN号 | 0067-0049 |
| 英文摘要 | We mapped the Mid-course Space Experiment dark cloud G084.81-01.09 in the NH(3)(1,1)-(4,4) lines and in the J = 1-0 transitions of (12)CO, (13)CO, C(18)O, and HCO(+) in order to study the physical properties of infrared dark clouds, and to better understand the initial conditions for massive star formation. Six ammonia cores are identified with masses ranging from 60 to 250 M(circle dot), a kinetic temperature of 12 K, and a molecular hydrogen number density n(H(2)) similar to 10(5) cm(-3). In our high-mass cores, the ammonia line width of 1 km s(-1) is larger than those found in lower mass cores but narrower than the more evolved massive ones. We detected self-reversed profiles in HCO(+) across the northern part of our cloud and velocity gradients in different molecules. These indicate an expanding motion in the outer layer and more complex motions of the clumps more inside our cloud. We also discuss the millimeter wave continuum from the dust. These properties indicate that our cloud is a potential site of massive star formation but is still in a very early evolutionary stage. |
| 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] | DENSE CORES ; GALACTIC PLANE ; NORTH-AMERICA ; PELICAN NEBULAE ; PROTOSTELLAR CANDIDATES ; INITIAL CONDITIONS ; MOLECULAR-LINE ; AMMONIA ; CLUMPS ; CONTINUUM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000289059000010 |
| 公开日期 | 2012-08-07 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/4404]  |
| 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.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 3.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA 4.Max Planck Inst Radioastron, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Zhang, S. B.,Yang, J.,Xu, Y.,et al. EARLY PHASE OF MASSIVE STAR FORMATION: A CASE STUDY OF THE INFRARED DARK CLOUD G084.81-01.09[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2011,193(1):10(14pp). |
| APA | Zhang, S. B.,Yang, J.,Xu, Y.,Pandian, J. D.,Menten, K. M.,&Henkel, C..(2011).EARLY PHASE OF MASSIVE STAR FORMATION: A CASE STUDY OF THE INFRARED DARK CLOUD G084.81-01.09.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,193(1),10(14pp). |
| MLA | Zhang, S. B.,et al."EARLY PHASE OF MASSIVE STAR FORMATION: A CASE STUDY OF THE INFRARED DARK CLOUD G084.81-01.09".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 193.1(2011):10(14pp). |
入库方式： OAI收割
来源：紫金山天文台
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