盖亚DR3中年轻恒星揭示的局部螺旋结构的运动学

IF 8.6 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astrophysical Journal Supplement Series Pub Date : 2023-09-20 DOI:10.3847/1538-4365/acf3e3

Dejian Liu, Ye Xu, Chaojie Hao, Shuaibo Bian, Zehao Lin, Yingjie Li, Jingjing Li

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引用次数: 0

摘要

利用Gaia数据发布3中的年轻疏散星团和o - b2型恒星，研究了局部螺旋结构的运动学。一般来说，外旋臂中的年轻源可能比内旋臂中的源表现出更大的特殊运动。年轻的疏散星团似乎比o - b2型恒星有更小的特殊运动，英仙座和本旋星团的源可能向银河系中心向内运动，旋转速度比银河系慢。同时，船底座臂上的光源可能从太阳向银河系中心的相反方向移动，并且旋转速度略快于银河系的旋转速度。此外，利用年轻的疏散星团和o - b2型恒星，我们改进了运动学方法对太阳附近几个区域的距离估计。

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

Abstract 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.

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来源期刊

Astrophysical Journal Supplement Series 地学天文-天文与天体物理

CiteScore

14.50

自引率

5.70%

发文量

264

审稿时长

2 months

期刊介绍： The Astrophysical Journal Supplement (ApJS) serves as an open-access journal that publishes significant articles featuring extensive data or calculations in the field of astrophysics. It also facilitates Special Issues, presenting thematically related papers simultaneously in a single volume.