Rotation of the Milky Way Halo in the Solar Vicinity Based on GAIA DR3 Catalog

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astronomy Reports Pub Date : 2024-10-06 DOI:10.1134/S1063772924700677

R. V. Tkachenko, A. P. Bryndina, A. B. Zhmailova, V. I. Korchagin

引用次数: 0

Abstract

The rotation of the Milky Way halo in the solar vicinity is studied using kinematic data of the GAIA DR3 catalog for RR Lyrae variable stars with parallax errors of less than 20%. Two criteria were used for selecting halo stars: kinematic and spatial. In both approaches, we confirm the existence of weak rotation of the halo in the direction opposite to the rotation of the Galactic disk with velocities of \(4.08 \pm 2.19\) km/s for the kinematic criterion and \(9.49 \pm 2.59\) km/s for the spatial criterion.

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基于 GAIA DR3 星表的太阳附近银河系光环的旋转

利用 GAIA DR3 星表中视差误差小于 20% 的天琴座 RR 变星的运动学数据，研究了太阳附近银河晕的旋转情况。我们采用了两种标准来选择日晕恒星：运动学标准和空间标准。在这两种方法中，我们都证实了光环存在着与银河盘旋转方向相反的微弱旋转，运动学标准的速度为\(4.08 \pm 2.19\) km/s，空间标准的速度为\(9.49 \pm 2.59\) km/s。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Astronomy Reports 地学天文-天文与天体物理

CiteScore

1.40

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Astronomy Reports is an international peer reviewed journal that publishes original papers on astronomical topics, including theoretical and observational astrophysics, physics of the Sun, planetary astrophysics, radio astronomy, stellar astronomy, celestial mechanics, and astronomy methods and instrumentation.