{"title":"Kinematics of High-Velocity Stars within 300 pc from the Sun according to Gaia DR3","authors":"A. V. Tutukov, N. V. Chupina, S. V. Vereshchagin","doi":"10.1134/S1063772923120120","DOIUrl":null,"url":null,"abstract":"<p>The kinematics of stars from the solar neighborhood with a radius of 300 pc has been studied using the Gaia DR3 data. Our sample includes <i>n</i> = 970 171 stars—AG300 (A—ensemble, G—Gaia, 300—radius of the studied zone in pc). The kinematics of these stars reflects the morphology of the main stellar populations of the Galaxy: the stellar disk, bulge, halo, and stellar corona of a supermassive black hole (SMBH). The presence of stars in AG300 with velocities exceeding the escape velocity from the Galaxy indicates the presence in the circumsolar space of extragalactic stars belonging to the stellar component of the local cluster of galaxies. It is shown that the known mechanisms of acceleration of the spatial motion of stars make it possible to create a stellar halo of galaxies, a stellar corona of SMBH in its nucleus, an intergalactic stellar medium of galaxy clusters, and spaces between galaxy clusters. The AG300 catalog makes it possible to identify representatives of all named components.</p>","PeriodicalId":55440,"journal":{"name":"Astronomy Reports","volume":"67 12","pages":"1418 - 1441"},"PeriodicalIF":1.1000,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomy Reports","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063772923120120","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
The kinematics of stars from the solar neighborhood with a radius of 300 pc has been studied using the Gaia DR3 data. Our sample includes n = 970 171 stars—AG300 (A—ensemble, G—Gaia, 300—radius of the studied zone in pc). The kinematics of these stars reflects the morphology of the main stellar populations of the Galaxy: the stellar disk, bulge, halo, and stellar corona of a supermassive black hole (SMBH). The presence of stars in AG300 with velocities exceeding the escape velocity from the Galaxy indicates the presence in the circumsolar space of extragalactic stars belonging to the stellar component of the local cluster of galaxies. It is shown that the known mechanisms of acceleration of the spatial motion of stars make it possible to create a stellar halo of galaxies, a stellar corona of SMBH in its nucleus, an intergalactic stellar medium of galaxy clusters, and spaces between galaxy clusters. The AG300 catalog makes it possible to identify representatives of all named components.
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.
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