RINGS AND RADIAL WAVES IN THE DISK OF THE MILKY WAY
文献类型：期刊论文
| 作者 | Xu, Yan1,2 ; Newberg, Heidi Jo2; Carlin, Jeffrey L.2; Liu, Chao1; Deng, Licai1; Li, Jing3; Schoenrich, Ralph4; Yanny, Brian5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-03-10 |
| 卷号 | 801期号:2 |
| 关键词 | Galaxy: disk Galaxy: kinematics and dynamics Galaxy: structure |
| 英文摘要 | We show that in the anticenter region, between Galactic longitudes of 110 degrees < l < 229 degrees, there is an oscillating asymmetry in the main-sequence star counts on either side of the Galactic plane using data from the Sloan Digital Sky Survey. This asymmetry oscillates from more stars in the north at distances of about 2 kpc from the Sun to more stars in the south at 4-6 kpc from the Sun to more stars in the north at distances of 8-10 kpc from the Sun. We also see evidence that there are more stars in the south at distances of 12-16 kpc from the Sun. The three more distant asymmetries form roughly concentric rings around the Galactic center, opening in the direction of the Milky Way's spiral arms. The northern ring, 9 kpc from the Sun, is easily identified with the previously discovered Monoceros Ring. Parts of the southern ring at 14 kpc from the Sun (which we call the TriAnd Ring) have previously been identified as related to the Monoceros Ring, and others have been called the Triangulum Andromeda Overdensity. The two nearer oscillations are approximated by a toy model in which the disk plane is offset by the order of 100 pc up and then down at different radii. We also show that the disk is not azimuthally symmetric around the Galactic anticenter and that there could be a correspondence between our observed oscillations and the spiral structure of the Galaxy. Our observations suggest that the TriAnd and Monoceros Rings (which extend to at least 25 kpc from the Galactic center) are primarily the result of disk oscillations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000350965500034 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5736]  |
| 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.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England 5.Fermilab Natl Accelerator Lab, Expt Astrophys Grp, Batavia, IL 60510 USA |
| 推荐引用方式 GB/T 7714 | Xu, Yan,Newberg, Heidi Jo,Carlin, Jeffrey L.,et al. RINGS AND RADIAL WAVES IN THE DISK OF THE MILKY WAY[J]. ASTROPHYSICAL JOURNAL,2015,801(2). |
| APA | Xu, Yan.,Newberg, Heidi Jo.,Carlin, Jeffrey L..,Liu, Chao.,Deng, Licai.,...&Yanny, Brian.(2015).RINGS AND RADIAL WAVES IN THE DISK OF THE MILKY WAY.ASTROPHYSICAL JOURNAL,801(2). |
| MLA | Xu, Yan,et al."RINGS AND RADIAL WAVES IN THE DISK OF THE MILKY WAY".ASTROPHYSICAL JOURNAL 801.2(2015). |
入库方式： OAI收割
来源：国家天文台
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