arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.12913astro-ph.GA
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螺旋星系

Spiral Galaxies

Francoise Combes

摘要:

自从像斯隆这样的大型星系调查时代以来,我们对星系的看法发生了重大变化,它为我们提供了数百万星系的广泛统计数据。第一章中描述的哈勃序列分类仍然被广泛使用,但已经丰富了基于颜色的广泛类别,这些类别表明了最近的恒星形成:红色的被动星系序列,仅由老恒星组成,蓝色的星云是活跃的恒星形成。第3章主要关注具有主导椭球体的星系,这些星系通常在红色序列中发现。关于星系演化的一个关键问题仍然有待回答,那就是了解星系如何突然从一个类别转变为另一个类别。这是一篇研究生水平的演讲,而不是一篇评论文章。

英文摘要:

Our vision of galaxies has changed significantly since the era of large galaxy surveys like the Sloan, which gave us extensive statistics with millions of galaxies. The Hubble sequence classification described in Chapter 1 still remains very widely used but has been enriched with broad categories based on color that indicate the recent formation of stars: the red sequence of passive galaxies, consisting solely of old stars, and the blue cloud of galaxies with active star formation. Chapter 3 focused on galaxies with a dominant spheroid, which are generally found on the red sequence. One of the key questions about the evolution of galaxies that remain to be answered is to understand how a galaxy can suddenly pass from one category to another. This is a graduate-student level lecture, not a review article.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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