A Scattered Star Group in the Orion A Region of the Milky Way

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS Galaxies Pub Date : 2023-09-19 DOI:10.3390/galaxies11050099
Sergei Vereshchagin, Natalya Chupina, Kristina Lyzenko, Anatoly Kalinkin, Nikolay Kondratev, Dana Kovaleva, Sergei Sapozhnikov
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Abstract

Using Gaia DR3 data, we identified an extended a ~60 pc group of stars sharing common motion but scattered in space, including from 150 to 300 probable members, named Group V. It can be associated with a group identified by Getman et al. (2019) and by Jerabkova et al. (2019) as a relic of a gas filament, traced by the mutual position of stars after the gas is swept out. We estimate its age to be approximately 16 million years. A combination of methods is applied to select probable members of Group V. We discuss the kinematic characteristics of the stars of Group V and the controversial clues they provide for understanding its nature. Due to the vicinity of a number of open clusters in the space, differentiating between members of the group and of the clusters is problematic, and mutual contamination is inevitable. The pair of clusters Gulliver 6 and UBC 17b is wrapped inside Group V but differs from it in kinematics.
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银河系猎户座A区的一个星团
利用盖亚DR3的数据,我们确定了一个扩展到约60 pc的恒星群,它们共享共同的运动,但分散在太空中,包括150到300个可能的成员,命名为v群。它可以与Getman等人(2019)和Jerabkova等人(2019)确定的一个群体相关联,作为气体灯丝的遗迹,通过气体被扫出后恒星的相互位置来追踪。我们估计它的年龄大约是1600万年。我们讨论了V群恒星的运动学特征,以及它们为理解V群的性质提供的有争议的线索。由于空间中有许多开放集群,区分集群成员和集群成员是有问题的,相互污染是不可避免的。一对星团格列佛6和UBC 17b被包裹在V群中,但在运动学上与V群不同。
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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