SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS
文献类型：期刊论文
| 作者 | Carlin, Jeffrey L.1; DeLaunay, James1; Newberg, Heidi Jo1; Deng, Licai2 ; Gole, Daniel1,3; Grabowski, Kathleen1; Jin, Ge4; Liu, Chao2; Liu, Xiaowei5,6; Luo, A-Li2
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 出版日期 | 2013-11-01 |
| 卷号 | 777期号:1 |
| 关键词 | Galaxy: disk Galaxy: kinematics and dynamics Galaxy: stellar content Galaxy: structure stars: kinematics and dynamics |
| 英文摘要 | We find that Galactic disk stars near the anticenter exhibit velocity asymmetries in both the Galactocentric radial and vertical components across the midplane as well as azimuthally. These findings are based on Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectroscopic velocities for a sample of similar to 400,000 F-type stars, combined with proper motions from the PPMXL catalog for which we have derived corrections to the zero points based in part on spectroscopically discovered galaxies and QSOs from LAMOST. In the region within 2 kpc outside the Sun's radius and +/-2 kpc from the Galactic midplane, we show that stars above the plane exhibit net outward radial motions with downward vertical velocities, while stars below the plane have roughly the opposite behavior. We discuss this in the context of other recent findings, and conclude that we are likely seeing the signature of vertical disturbances to the disk due to an external perturbation. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000326187400005 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5818]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 3.SUNY Coll Geneseo, Dept Phys, Geneseo, NY 14454 USA 4.Univ Sci & Technol China, Hefei 230026, Peoples R China 5.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Carlin, Jeffrey L.,DeLaunay, James,Newberg, Heidi Jo,et al. SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,777(1). |
| APA | Carlin, Jeffrey L..,DeLaunay, James.,Newberg, Heidi Jo.,Deng, Licai.,Gole, Daniel.,...&Zhao, Yongheng.(2013).SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS.ASTROPHYSICAL JOURNAL LETTERS,777(1). |
| MLA | Carlin, Jeffrey L.,et al."SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS".ASTROPHYSICAL JOURNAL LETTERS 777.1(2013). |
入库方式： OAI收割
来源：国家天文台
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