arXiv 2204.048772022-04astro-ph.CO

具有暗物质背景的引力不稳定性：探索不同的方案

Gravitational instability with a dark matter background: Exploring the different scenarios

Kamel Ourabah

DOI：: 10.1140/epjc/s10052-022-10529-0

摘要：

利用混合量子-经典流体方法研究了重子（亮）粒子和暗物质粒子组成的自引力介质的Jeans型引力不稳定性。重子物质被经典地处理，这适用于大多数天体物理环境，例如，博克球，而暗物质是通过量子流体动力学的方法，允许可能的非线性处理。这些非线性可能会出现在玻色子暗物质中，这是由于吸引或排斥的短程自相互作用（吸引相互作用与轴子更相关），或者来自费米子暗物质的泡利不相容原理，例如，大质量中微子这使我们能够探索，在一个非常广泛的背景下，暗物质背景的影响，在文献中讨论的不同情况下的牛仔裤过程。在最简单的情况下，它表明，暗物质的背景上的金斯质量的影响只取决于重子和暗物质粒子的密度和速度色散的比例。利用这一点，我们面对建立的稳定性标准与博克球稳定性观测，并表明该模型充分考虑的数据与暗物质参数接近那些独立预测的数值模拟。

英文摘要：

We study the Jeans-type gravitational instability for a self-gravitating medium composed of two species, baryonic (bright) and dark matter particles, using a hybrid quantum-classical fluid approach. Baryonic matter is treated classically, which is appropriate for most astrophysical environments, e.g., Bok globules, while dark matter is treated through a quantum hydrodynamic approach allowing for possible nonlinearities. These nonlinearities may arise in bosonic dark matter due to attractive or repulsive short-range self-interaction (attractive interaction being more relevant for axions) or from the Pauli exclusion principle for fermionic dark matter, e.g., massive neutrinos. This allows us to explore, in a very broad context, the impact of a dark matter background on the Jeans process for different scenarios discussed in the literature. In the simplest case, it is shown that the effect of a dark matter background on the Jeans mass depends only on the ratio of densities and velocity dispersions of baryonic and dark matter particles. Taking advantage of that, we confront the established stability criterion with Bok globule stability observations and show that the model adequately accounts for the data with dark matter parameters close to those predicted independently from numerical simulations.

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。

摘要：

英文摘要：

相关论文