Resolved stellar populations as a key to unlocking the formation and evolution of galaxies

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astrophysics and Space Science Pub Date : 2024-11-11 DOI:10.1007/s10509-024-04376-6

Ata Sarajedini

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Abstract

We provide highlights of research investigations over the last five decades in the area of resolved stellar populations. After discussing the early work on the state of blue straggler stars in Galactic globular clusters, we broaden our gaze to include all of the stellar systems in the Local Volume with the overall goal of understanding the formation and evolution of galaxies. More specifically, we focus on the stellar constituents (e.g. star clusters and RR Lyrae variables) of the Milky Way, the Magellanic Clouds, the Andromeda galaxy (M31), the Triangulum galaxy (M33), as well as several dwarf galaxies in the Local Group and two dwarfs in the Sculptor group. Because of the available instrumental capabilities, work on resolved stars in galaxies has been largely focused on stellar systems in the Local Group and nearby galaxy groups. The big picture of galaxy formation and evolution that emerges from an analysis of all these constituents is largely consistent with the dwarf galaxy fragmentation and accretion scenario first put forth by Leonard Searle and Robert Zinn in 1978.

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解析恒星群是开启星系形成和演化之门的钥匙

我们将重点介绍过去五十年来在解析恒星群领域的研究调查。在讨论了早期关于银河系球状星团中蓝色杂散恒星状态的工作之后，我们将目光扩大到包括本天体中的所有恒星系统，总体目标是了解星系的形成和演化。更具体地说，我们的研究重点是银河系、麦哲伦云、仙女座星系（M31）、三角座星系（M33）的恒星成分（如星团和天琴座RR变星），以及本星系群中的几个矮星系和雕刻星系群中的两个矮星系。由于现有的仪器能力，有关星系中解析恒星的工作主要集中在本星系群和附近星系群的恒星系统上。对所有这些成分的分析所得出的星系形成和演化的全貌，在很大程度上与 Leonard Searle 和 Robert Zinn 于 1978 年首次提出的矮星系碎裂和吸积设想是一致的。

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来源期刊

Astrophysics and Space Science 地学天文-天文与天体物理

CiteScore

3.40

自引率

5.30%

发文量

106

审稿时长

2-4 weeks

期刊介绍： Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.