arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.05220astro-ph.HEgr-qc
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玻色子星周围气体云运动的潮汐效应

Tidal effects in the motion of gas clouds around boson stars

Matheus C. Teodoro, Lucas G. Collodel, Jutta Kunz

摘要:

我们报告模拟潮汐破裂云轨道球对称紧凑玻色子星在两个不同的制度。首先,我们考虑云在三个不同的约束轨道接近玻色子星,并分析这些碎片形成的机制。我们从模拟中推断,这些热点的寿命更长的圆形轨道上的云比偏心轨道上的云。接下来,我们将比较玻色子星和史瓦西黑洞周围圆形轨道上更大范围和更小密度云的演化。作为模拟的结果,我们观察到玻色子星周围形成了环状结构,具有螺旋激波结构和恒定的热韧致辐射总亮度。这最终的配置与黑洞的情况形成强烈对比,在黑洞的情况下,气体完全被捕获在事件视界后面。

英文摘要:

We report simulations regarding tidal disruption clouds orbiting spherically symmetric compact boson stars in two different regimes. First we consider clouds in three different bound orbits close to the boson star and analyze the mechanisms of debris formation for these. We infer from the simulations that the lifetimes of these hot-spots are longer for circularly orbiting clouds than for clouds on eccentric orbits. Next we compare the evolution of more extended and less dense clouds on circular orbits around a boson star and a Schwarzschild black hole. As an outcome of the simulations we observe the formation of a ring-like structure around the boson star endowed with a spiralling shock structure and a constant thermal bremsstrahlung total luminosity. This final configuration contrasts strongly with the black hole scenario where the gas is totally captured behind the event horizon.

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