KINEMATICS OF HIGH-SPEED STARS WITHIN 300 PCS FROM THE SUN ACCORDING TO GAIA DR3

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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 core, 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.

About the authors

A. V. Tutukov

Institute of Astronomy of the Russian Academy of Sciences

Email: svvs@ya.ru
Russia, Moscow

N. V. Chupina

Institute of Astronomy of the Russian Academy of Sciences

Email: svvs@ya.ru
Russia, Moscow

S. V. Vereshchagin

Institute of Astronomy of the Russian Academy of Sciences

Author for correspondence.
Email: svvs@ya.ru
Russia, Moscow

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Copyright (c) 2023 А.В. Тутуков, Н.В. Чупина, С.В. Верещагин

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