Substructure in Bulk Velocities of Milky Way Disk Stars

被引：0

作者：

Carlin, Jeffrey L. ^{[1
]}

DeLaunay, James ^{[1
]}

Newberg, Heidi Jo ^{[1
]}

Deng, Licai ^{[2
]}

Gole, Daniel ^{[1
,3
]}

Grabowski, Kathleen ^{[1
]}

Jin, Ge ^{[4
]}

Liu, Chao ^{[2
]}

Liu, Xiaowei ^{[5
,6
]}

Luo, A-Li ^{[2
]}

Yuan, Haibo ^{[5
,6
]}

Zhang, Haotong ^{[2
]}

Zhao, Gang ^{[2
]}

Zhao, Yongheng ^{[2
]}

机构：

[1] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, 110 8th St, Troy, NY 12180 USA

[2] Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, 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

来源：

STRUCTURE AND DYNAMICS OF DISK GALAXIES | 2014年 / 480卷

关键词：

SKY SURVEY 2MASS; WAVES;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that stars near the anticenter in the Galactic disk have bulk motions in both the vertical and radial directions that are unexpected for stars with disk-like kinematics. The asymmetries are present in independent data sets from the LAMOST and SDSS surveys that probe the same volume of the Galaxy. This substructure in the nearby disk is likely due to a perturbation by a passing dwarf galaxy or dark matter subhalo.

引用

页码：19 / 22

页数：4

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