ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER
文献类型：期刊论文
| 作者 | Li, Jing1,2; Newberg, Heidi Jo3; Carlin, Jeffrey L.3; Deng, Licai1 ; Newby, Matthew3; Willett, Benjamin A.3; Xu, Yan1; Luo, Zhiquan2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2012-10-01 |
| 卷号 | 757期号:2 |
| 关键词 | Galaxy: disk Galaxy: halo Galaxy: stellar content Galaxy: structure |
| 英文摘要 | We confirm that there are at least three separate low-latitude overdensities of blue F turnoff stars near the Milky Way anti-center: the Monoceros Ring, the Anti-Center Stream (ACS), and the Eastern Banded Structure (EBS). There might also be a small number of normal thick disk stars at the same location. The ACS is a tilted component that extends to higher Galactic latitude at lower Galactic longitude, 10 kpc from the Sun toward the anti-center. It has a sharp cutoff on the high-latitude side. Distance, velocity, and proper motion measurements are consistent with previous orbit fits. The mean metallicity is [Fe/H] = -0.96 +/- 0.03, which is lower than the thick disk and Monoceros Ring. The Monoceros Ring is a higher density substructure that is present at 15 degrees < b < 22 degrees at all longitudes probed in this survey. The structure likely continues toward lower latitudes. The distances are consistent with a constant distance from the Galactic center of 17.6 kpc. The mean line-of-sight velocity of the structure is consistent with a thick disk rotation. However, the velocity dispersion of these stars is similar to 15 km s(-1) and the metallicity is [Fe/H] = -0.80 +/- 0.01. Both of these quantities are lower than the canonical thick disk. We suggest that this ring structure is likely different from the thick disk, though its association with the disk cannot be definitively ruled out. The EBS is detected primarily photometrically, near (l, b) = (225 degrees, 30 degrees), at a distance of 10.9 kpc from the Sun. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000309108500044 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6169]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.China W Normal Univ, Sch Phys & Elect Informat, Nanchong 637002, Peoples R China 3.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA |
| 推荐引用方式 GB/T 7714 | Li, Jing,Newberg, Heidi Jo,Carlin, Jeffrey L.,et al. ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER[J]. ASTROPHYSICAL JOURNAL,2012,757(2). |
| APA | Li, Jing.,Newberg, Heidi Jo.,Carlin, Jeffrey L..,Deng, Licai.,Newby, Matthew.,...&Luo, Zhiquan.(2012).ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER.ASTROPHYSICAL JOURNAL,757(2). |
| MLA | Li, Jing,et al."ON RINGS AND STREAMS IN THE GALACTIC ANTI-CENTER".ASTROPHYSICAL JOURNAL 757.2(2012). |
入库方式： OAI收割
来源：国家天文台
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