论文标题
最大熵的原理解释了矮星系的质量分布中观察到的核心
The principle of maximum entropy explains the cores observed in the mass distribution of dwarf galaxies
论文作者
论文摘要
冷暗物质（CDM）模拟预测星系质量分布的中心尖端。该预测与矮星系的观察结果形成鲜明对比，矮星系在其密度分布中显示了中央高原或“核心”。该核心CUSP问题的建议解决方案可以分为两种类型。他们要么调用星系的重型分量产生的反馈机制，要么假设暗物质（DM）粒子的特性偏离CDM假设。在这里，我们提出了一种替代性但互补的解释。我们认为，在非扩展统计力学导致的最大熵系统的自我磨碎系统中，岩心是不可避免的。它们的结构来自Tsallis熵，适用于具有远距离相互作用的系统。令人惊讶的是，这种热力学平衡预测的质量密度曲线与观察到的核心匹配，而无需进行任何调整或调整。因此，最大tsallis熵的原理解释了矮星系中的核心。
Cold Dark Matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies which show a central plateau or 'core' in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. Either they invoke feedback mechanisms produced by the baryonic component of the galaxies, or they assume the properties of the dark matter (DM) particle to depart from the CDM hypothesis. Here we propose an alternative yet complementary explanation. We argue that cores are unavoidable in the self-gravitating systems of maximum entropy resulting from non-extensive statistical mechanics. Their structure follows from the Tsallis entropy, suitable for systems with long-range interactions. Strikingly, the mass density profiles predicted by such thermodynamic equilibrium match the observed cores without any adjustment or tuning. Thus, the principle of maximum Tsallis entropy explains the presence of cores in dwarf galaxies.
