论文标题
气体贫困矮人球形星系中的尖峰核问题
The cusp-core problem in gas-poor dwarf spheroidal galaxies
论文作者
论文摘要
这篇综述涉及矮星系中内部暗物质密度曲线的不一致性，称为尖峰核问题。特别是，我们旨在专注于贫困矮星系。这个冷暗物质小规模问题的最有希望的解决方案之一是出色的反馈，但似乎仅是为富含气体的矮人而设计的。但是，在古典矮人的制度中，这种核心机制变得可以忽略不计。因此，必须找到解决方案而不调用这些重态过程，因为即使对于这些矮小的矮人，这些岩心也倾向于持续存在，而这些矮人却以深色的物质为主。在这里，我们提出了两类解决方案。其中一个是通过通过Perturbers改变暗物质的潜力来从尖齿中产生暗物质核心。第二类收集了描述替代理论中暗物质核心自然出现的解决方案。考虑到各种各样的解决方案，有必要通过找到它们留下的观察性特征来确定星系中心区域中哪种机制来占主导地位，以突出暗物质的真实本质。
This review deals with the inconsistency of inner dark matter density profiles in dwarf galaxies, known as the cusp-core problem. Particularly, we aim to focus on gas-poor dwarf galaxies. One of the most promising solutions to this cold dark matter small scale issue is the stellar feedback but it seems to be only designed for gas-rich dwarfs. However, in the regime of classical dwarfs, this core mechanism becomes negligible. Therefore, it is required to find solutions without invoking these baryonic processes as dark matter cores tend to persist even for these dwarfs, which are rather dark matter-dominated. Here we have presented two categories of solutions. One consists of creating dark matter cores from cusps within cold dark matter by altering the dark matter potential via perturbers. The second category gathers solutions which depict the natural emergence of dark matter cores in alternative theories. Given the wide variety of solutions, it becomes necessary to identify which mechanism dominates in the central region of galaxies by finding observational signatures left by them in order to highlight the true nature of dark matter.
