The spiral structure of the Milky Way
文献类型：期刊论文
| 作者 | Xu, Ye1 ; Hou, Li-Gang2,3; Wu, Yuan-Wei4
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 18期号:12页码:20 |
| ISSN号 | 1674-4527 |
| 关键词 | Galaxy: structure Galaxy: kinematics and dynamics masers techniques: high Galaxy: structure Galaxy: kinematics and dynamics masers techniques: high angular resolution astrometry stars: formationangular resolution astrometry stars: formation |
| DOI | 10.1088/1674-4527/18/12/146 |
| 通讯作者 | Xu, Ye(xuye@pmo.ac.cn) |
| 英文摘要 | The morphology and kinematics of the spiral structure of the Milky Way are long-standing problems in astrophysics. In this review we firstly summarize variousmethodswith different tracers used to solve this puzzle. The astrometry of Galactic sources is gradually alleviating this difficult situation caused mainly by large distance uncertainties, as we can currently obtain accurate parallaxes (a few mu as) and proper motions (approximate to 1 kms(-1)) by using Very Long Baseline Interferometry (VLBI). On the other hand, the Gaia mission is providing the largest, uniform sample of parallaxes for O-type stars in the entire Milky Way. Based upon the VLBI maser and Gaia O-star parallax measurements, nearby spiral structures of the Perseus, Local, Sagittarius and Scutum Arms are determined in unprecedented detail. Meanwhile, we estimate fundamental Galactic parameters of the distance to the Galactic center, R-0, to be 8.35 +/- 0.18 kpc, and circular rotation speed at the Sun, theta(0), to be 240 +/- 10 kms(-1). We found kinematic differences between O stars and interstellar masers: the O stars, on average, rotate faster, > 8 kms(-1) than maser-traced high-mass star forming regions. |
| WOS关键词 | STAR-FORMING REGION ; H-II REGIONS ; MOLECULAR CLOUD COMPLEXES ; RECONSTRUCTING CO MAPS ; TRIGONOMETRIC PARALLAXES ; OPEN CLUSTERS ; OUTER GALAXY ; 3-DIMENSIONAL DISTRIBUTION ; PHYSICAL-PROPERTIES ; GALACTIC STRUCTURE |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000454953800002 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/20487]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Xu, Ye |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Natl Time Serv Ctr, Key Lab Precise Positioning & Timing Technol, Xian 710600, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Ye,Hou, Li-Gang,Wu, Yuan-Wei. The spiral structure of the Milky Way[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(12):20. |
| APA | Xu, Ye,Hou, Li-Gang,&Wu, Yuan-Wei.(2018).The spiral structure of the Milky Way.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(12),20. |
| MLA | Xu, Ye,et al."The spiral structure of the Milky Way".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.12(2018):20. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。