A RESONANT FEATURE NEAR THE PERSEUS ARM REVEALED BY RED CLUMP STARS
文献类型：期刊论文
| 作者 | Liu, Chao1,2 ; Xue, Xiangxiang1,2; Fang, Min3,4; van de Ven, Glenn2; Wu, Yue1; Smith, Martin C.5; Carrell, Kenneth1
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 出版日期 | 2012-07-01 |
| 卷号 | 753期号:1 |
| 关键词 | galaxies: individual (Milky Way) Galaxy: disk Galaxy: kinematics and dynamics Galaxy: structure stars: kinematics and dynamics |
| 英文摘要 | We investigate the extinction, together with the radial velocity (RV) dispersion and distribution of red clump stars in the anticenter direction using spectra obtained with Hectospec on the MMT. We find that extinction peaks at Galactocentric radii of about 9.5 and 12.5 kpc, right in front of the locations of the Perseus and Outer arms and in line with the relative position of dust and stars in external spiral galaxies. The RV dispersion peaks around 10 kpc, which coincides with the location of the Perseus arm, yields an estimated arm-interarm density contrast of 1.3-1.5, and is in agreement with previous studies. Finally, we discover that the RV distribution bifurcates around 10-11 kpc into two peaks at +27 km s(-1) and -4 km s(-1). This seems to be naturally explained by the presence of the outer Lindblad resonance of the Galactic bar, but further observations will be needed to understand if the corotation resonance of the spirals arms also plays a role. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000305637900024 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6072]  |
| 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.Max Planck Inst Astron, D-69117 Heidelberg, Germany 3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 5.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Chao,Xue, Xiangxiang,Fang, Min,et al. A RESONANT FEATURE NEAR THE PERSEUS ARM REVEALED BY RED CLUMP STARS[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,753(1). |
| APA | Liu, Chao.,Xue, Xiangxiang.,Fang, Min.,van de Ven, Glenn.,Wu, Yue.,...&Carrell, Kenneth.(2012).A RESONANT FEATURE NEAR THE PERSEUS ARM REVEALED BY RED CLUMP STARS.ASTROPHYSICAL JOURNAL LETTERS,753(1). |
| MLA | Liu, Chao,et al."A RESONANT FEATURE NEAR THE PERSEUS ARM REVEALED BY RED CLUMP STARS".ASTROPHYSICAL JOURNAL LETTERS 753.1(2012). |
入库方式： OAI收割
来源：国家天文台
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