Kinematics of the Local Spiral Structure Revealed by Young Stars in Gaia DR3

被引：4

作者：

Liu, Dejian ^{[1
,2
]}

Xu, Ye ^{[1
,2
]}

Hao, Chaojie ^{[1
,2
]}

Bian, Shuaibo ^{[1
]}

Lin, Zehao ^{[1
,2
]}

Li, Yingjie ^{[1
]}

Li, Jingjing ^{[1
]}

机构：

[1] Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China

[2] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2023年 / 268卷 / 02期

关键词：

MILKY-WAY; TRIGONOMETRIC PARALLAXES; FORMING REGIONS; ARM; DISTANCE; MOTIONS; VIEW;

D O I：

10.3847/1538-4365/acf3e3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using young open clusters and O-B2-type stars in Gaia Data Release 3, we investigate the kinematics of the local spiral structure. In general, the young sources in the outer spiral arms may present larger peculiar motions than those in the inner spiral arms. The young open clusters appear to have smaller peculiar motions than the O-B2-type stars, and the sources in both the Perseus and Local Arms may show an inward motion toward the Galactic center and rotate slower than Galactic rotation. Meanwhile, the sources in the Carina Arm may move in the opposite direction from the Sun to the Galactic center and rotate marginally faster than Galactic rotation. In addition, using young open clusters and O-B2-type stars, we have improved the distance estimations of kinematic methods for several regions near the Sun.

引用

页数：10

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