Scholarlink

Abstract <p>The motion of stars whose spatial velocities have radial directions of motion in the galactic disk has been studied using numerical modeling. For this purpose, stars located within 100 pc from the Sun with spatial velocities directed approximately to the galactic Center (or anticenter) have been selected from the Gaia DR3 catalog. The sample included 13 stars with characteristics of halo stars: the eccentricities of their spatial orbits are close to unity and metallicity is significantly less than zero. An axisymmetric model of the Galaxy, including the bulge, disk, and halo, has been used. It has been found that the orbital apsides of the stars in our sample show a retrogradely directed precession with a velocity of 15–20 pc/million years in the interval from 10 to 20 kpc from the CG.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Kinematics of Stars with Radially Elongated Orbits Located within 100 pc from the Sun

  • 期刊论文

  • 发表日期：

    2025年5月1日

查看全文
  • E. S. Postnikova,
  • N. V. Chupina,
  • S. V. Vereshchagin

摘要

Abstract

The motion of stars whose spatial velocities have radial directions of motion in the galactic disk has been studied using numerical modeling. For this purpose, stars located within 100 pc from the Sun with spatial velocities directed approximately to the galactic Center (or anticenter) have been selected from the Gaia DR3 catalog. The sample included 13 stars with characteristics of halo stars: the eccentricities of their spatial orbits are close to unity and metallicity is significantly less than zero. An axisymmetric model of the Galaxy, including the bulge, disk, and halo, has been used. It has been found that the orbital apsides of the stars in our sample show a retrogradely directed precession with a velocity of 15–20 pc/million years in the interval from 10 to 20 kpc from the CG.