论文标题
矮星系的宇宙学模型的重型解决方案和挑战
Baryonic solutions and challenges for cosmological models of dwarf galaxies
论文作者
论文摘要
星系及其深色物物光环已经对暗能量以及冷暗物质（LCDM）宇宙学模型构成了一些挑战。观测和理论之间的这些差异加剧了最低质量（“矮人”）星系。 LCDM对低质量黑暗晕孔的数量，空间分布和内部结构的预测与观察到的矮星系相反，但这是部分预期的，因为许多预测仅模拟了深色 - m-Marters成分。任何稳健的LCDM预测都必须包括手工的模型，以了解男性物质如何填充并影响深色遗传晕。在本文中，我们回顾了LCDM在矮星系中面临的最显着挑战，并讨论了最近的宇宙学数值模拟是如何将重的Baryonic解决方案指出了这些挑战的。我们确定剩余的紧张局势，包括内部黑暗含量的多样性，卫星的平面，出色的形态和恒星形成淬火。它们的分辨率或作为LCDM的实际问题验证可能需要精炼星系形成模型，并提高模拟的数值准确性。
Galaxies and their dark-matter halos have posed several challenges to the Dark Energy plus Cold Dark Matter (LCDM) cosmological model. These discrepancies between observations and theory intensify for the lowest-mass (`dwarf') galaxies. LCDM predictions for the number, spatial distribution, and internal structure of low-mass dark-matter halos have historically been at odds with observed dwarf galaxies, but this is partially expected, because many predictions modeled only the dark-matter component. Any robust LCDM prediction must include, hand-in-hand, a model for galaxy formation to understand how baryonic matter populates and affects dark-matter halos. In this article, we review the most notable challenges to LCDM regarding dwarf galaxies, and we discuss how recent cosmological numerical simulations have pinpointed baryonic solutions to these challenges. We identify remaining tensions, including the diversity of the inner dark-matter content, planes of satellites, stellar morphologies, and star-formation quenching. Their resolution, or validation as actual problems to LCDM, will likely require both refining galaxy formation models and improving numerical accuracy in simulations.
