Flare and Warp of Galactic Disk with OB Stars from Gaia DR2
文献类型：期刊论文
| 作者 | Li, Chengdong1,2; Zhao, Gang1,2; Jia, Yunpeng1,2; Liao, Shilong3; Yang, Chengqun1,2; Wang, Qixun1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 871期号:2页码:8 |
| ISSN号 | 0004-637X |
| 关键词 | Galaxy: disk Galaxy: fundamental parameters Galaxy: kinematics and dynamics Galaxy: structure |
| DOI | 10.3847/1538-4357/aafa17 |
| 英文摘要 | The OB stars are selected from the Gaia DR2 catalog to explore the flare and warp of the Galactic disk in this work. The Gaia and 2MASS photometric information is adopted as the criteria to choose the sample stars. We model the Galactic disk stellar distribution in this work taking the flare and warp into consideration. The parameters in the flare and warp model are acquired directly by fitting the stars with the stellar distribution function of the disk. We obtain that the scale length of the Galactic disk in space density is 2.10 +/- 0.01 kpc. We find that the disk scale height increases with Galactic radius via fitting our sample stars perpendicular to the Galactic plane. The scale height of OB stars increases more moderately than old stellar populations in the disk. It is also concluded that the inner disk is flat and begins to warp at about 9 kpc away from Galactic center. The warp amplitude of OB stars is similar to pulsars and slowly increases along the Galactic radius. |
| 资助项目 | National Natural Science Foundation of China[11890694] ; National Natural Science Foundation of China[11390371] ; National Natural Science Foundation of China[11703065] ; National Natural Science Foundation of China[11573054] ; NSFC[11333003] ; NSFC[11390372] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000457527800006 |
| 源URL | [http://119.78.226.72/handle/331011/31955]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Zhao, Gang |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Chengdong,Zhao, Gang,Jia, Yunpeng,et al. Flare and Warp of Galactic Disk with OB Stars from Gaia DR2[J]. ASTROPHYSICAL JOURNAL,2019,871(2):8. |
| APA | Li, Chengdong,Zhao, Gang,Jia, Yunpeng,Liao, Shilong,Yang, Chengqun,&Wang, Qixun.(2019).Flare and Warp of Galactic Disk with OB Stars from Gaia DR2.ASTROPHYSICAL JOURNAL,871(2),8. |
| MLA | Li, Chengdong,et al."Flare and Warp of Galactic Disk with OB Stars from Gaia DR2".ASTROPHYSICAL JOURNAL 871.2(2019):8. |
入库方式： OAI收割
来源：上海天文台
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