AN OUTER ARM IN THE SECOND GALACTIC QUADRANT: STRUCTURE
文献类型：期刊论文
| 作者 | Du, Xinyu1,2,3; Xu, Ye1,3 ; Yang, Ji1,3; Sun, Yan1,2,3; Li, Facheng1,2,3; Zhang, Shaobo1,3; Zhou, Xin1,3
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| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
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| 出版日期 | 2016-05-01 |
| 卷号 | 224期号:1 |
| 关键词 | catalogs Galaxy: structure ISM: clouds ISM: molecules |
| 英文摘要 | The lack of arm tracers, especially remote tracers, is one of the most difficult problems preventing us from studying the structure of the Milky Way. Fortunately, with its high-sensitivity CO survey, the Milky Way Imaging Scroll Painting (MWISP) project offers such an opportunity. Since completing about one-third of its mission, an area of l = [100, 150]degrees, b = [-3, 5]degrees has nearly been covered. The Outer arm of the Milky Way first clearly revealed its shape in the second galactic quadrant in the form of molecular gas-this is the first time that the Outer arm has been reported in such a large-scale mapping of molecular gas. Using the 115 GHz (CO)-C-12(1-0) data of MWISP at the LSR velocity similar or equal to[-100, -60] km s(-1) and in the area mentioned above, we have detected 481 molecular clouds in total, and among them 332 (about 69%) are newly detected and 457 probably belong to the Outer arm. The total mass of the detected Outer arm clouds is similar to 3.1 x 10(6) M-circle dot. Assuming that the spiral arm is a logarithmic spiral, the pitch angle is fitted as similar to 13 degrees.1. Besides combining both the CO data from MWISP and the 21 cm H I data from the Canadian Galactic Plane Survey (CGPS), the gas distribution, warp, and thickness of the Outer arm are also studied. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STAR-FORMING REGIONS ; MILKY-WAY ; MOLECULAR CLOUDS ; SPIRAL STRUCTURE ; NEUTRAL-HYDROGEN ; SOLAR CIRCLE ; TRIGONOMETRIC PARALLAXES ; ATOMIC-HYDROGEN ; RADIO ASTRONOMY ; IRAS SOURCES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000377050200007 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/16228]  |
| 专题 | 紫金山天文台_紫金山天文台青海观测站 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Univ, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Xinyu,Xu, Ye,Yang, Ji,et al. AN OUTER ARM IN THE SECOND GALACTIC QUADRANT: STRUCTURE[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2016,224(1). |
| APA | Du, Xinyu.,Xu, Ye.,Yang, Ji.,Sun, Yan.,Li, Facheng.,...&Zhou, Xin.(2016).AN OUTER ARM IN THE SECOND GALACTIC QUADRANT: STRUCTURE.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,224(1). |
| MLA | Du, Xinyu,et al."AN OUTER ARM IN THE SECOND GALACTIC QUADRANT: STRUCTURE".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 224.1(2016). |
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来源：紫金山天文台
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