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arXiv 2011.01333astro-ph.COhep-ph
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暗物质晕中玻色子星形成和生长的新认识

New insights into the formation and growth of boson stars in dark matter halos

Jiajun Chen, Xiaolong Du, Erik W. Lentz, David J. E. Marsh, Jens C. Niemeyer

摘要:

本工作采用非线性动力学数值方法研究玻色子星及其周围微团簇的引力凝聚形成和生长。完全动态的吸引和排斥的自相互作用也被认为是第一次。在纯引力的情况下,我们数值证明了增长的玻色子恒星内晕减慢和饱和,如先前已被证明,并详细说明其条件。自相互作用包括使用Gross-Pitaevskii-Poisson方程。我们发现,在强吸引力的自相互作用的玻色子星的情况下,可以变得不稳定和崩溃,与以前的静态计算。在更强的耦合下,凝聚物碎裂。正如预期的那样,排斥性的自相互作用促进了玻色子星的形成,并导致了更大半径的解决方案。

英文摘要:

This work studies the formation and growth of boson stars and their surrounding miniclusters by gravitational condensation using non-linear dynamical numerical methods. Fully dynamical attractive and repulsive self-interactions are also considered for the first time. In the case of pure gravity, we numerically prove that the growth of boson stars inside halos slows down and saturates as has been previously conjectured, and detail its conditions. Self-interactions are included using the Gross-Pitaevskii-Poisson equations. We find that in the case of strong attractive self-interactions the boson stars can become unstable and collapse, in agreement with previous stationary computations. At even stronger coupling, the condensate fragments. Repulsive self-interactions, as expected, promote boson star formation, and lead to solutions with larger radii.

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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