Destruction of Open Star Clusters and the Radius–Mass Relationship

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Astronomy Reports Pub Date : 2024-12-18 DOI:10.1134/S1063772924700896
A. V. Tutukov, S. V. Vereshchagin, N. V. Chupina
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Abstract

The processes of formation and six mechanisms of disintegration of open star clusters (OSCs) are considered. Analytical estimates of the rates of OSC disintegration are made for the following mechanisms: loss of the initial gas component of OSCs, mass loss due to supernovae explosions and planetary nebula formation, pair interactions of OSC stars, acceleration of stars by binary systems of OSCs, interaction of OSC stars with stars of the Galactic disk, collisions of OSCs with giant molecular clouds (GMCs) at the front of a spiral wave. The destruction of OSCs is accompanied by the formation of a stellar stream. An analysis of the radius–mass ratio of the OSC core (RM) allowed us to conclude that it probably does not reflect the disintegration mechanism and is a product of observational selection effects. The evolution of an individual OSC in the RM plane is determined by the initial density and external conditions.

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疏散星团的毁灭与半径-质量关系
研究考虑了开放星团(OSCs)的形成过程和六种解体机制。对以下机制的开放星团解体速率进行了分析估计:开放星团初始气体成分的损失、超新星爆炸和行星状星云形成造成的质量损失、开放星团恒星的成对相互作用、开放星团双星系统对恒星的加速、开放星团恒星与银河系盘恒星的相互作用、开放星团与旋涡前端的巨分子云(GMC)的碰撞。OSC 的毁灭伴随着恒星流的形成。通过对 OSC 核心的半径-质量比(RM)进行分析,我们得出结论:它可能并不反映解体机制,而是观测选择效应的产物。单个OSC在R-M平面上的演化是由初始密度和外部条件决定的。
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来源期刊
Astronomy Reports
Astronomy Reports 地学天文-天文与天体物理
CiteScore
1.40
自引率
20.00%
发文量
57
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.
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