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arXiv 2402.00103astro-ph.GA
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MOND框架下致密大质量遗迹星系的形成

The formation of compact massive relic galaxies in MOND

Robin Eappen, Pavel Kroupa

AI总结:

本研究在MOND(米尔格罗姆动力学)框架下,通过分析孤立非自转大爆炸后气体云的坍缩动力学,揭示了无需暗物质即可自然形成致密大质量遗迹星系的机制,为星系形成与引力动力学的关联提供新视角。

摘要:

致密大质量遗迹星系是一类表现出自初始形成以来基本未发生变化特征的星系,堪称早期宇宙的“遗迹”。这类星系属于独特的星系类别,以具有强峰值的高速度弥散剖面和大旋转速度为典型特征。本研究在米尔格罗姆动力学(Milgromian Dynamics, MOND)框架下探究此类星系的形成过程,在无需引入冷暗物质或温暗物质存在的前提下,为其起源提供了全新视角。我们的分析聚焦于孤立的非自转大爆炸后气体云的坍缩动力学,发现其运动学剖面和密度剖面可与观测到的致密大质量遗迹星系(如NGC 1277、Mrk 1216和PGC 032873)相媲美。研究结果凸显了致密大质量遗迹星系在基于MOND的宇宙中可自然形成,为引力动力学与星系形成之间的相互作用提供了宝贵见解。

英文摘要:

Compact massive relic galaxies are a class of galaxies that exhibit characteristics suggesting they have remained largely unchanged since their initial formation, making them 'relics' of the early universe. These galaxies represent a distinct class characterized by strongly peaked high-velocity dispersion profiles with large rotational velocities. This study investigates the formation of such galaxies within the framework of Milgromian Dynamics (MOND), offering a unique perspective on their origin without invoking the presence of cold or warm dark matter. Our analysis focuses on the collapse dynamics of isolated non-rotating post-Big-Bang gas clouds, revealing kinematic and density profiles comparable to observed compact massive relic galaxies like NGC 1277, Mrk 1216, and PGC 032873. The findings underscore the natural emergence of compact massive relic galaxies within a MOND-based Universe, providing valuable insights into the interplay between gravitational dynamics and galaxy formation.

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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