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arXiv 2203.16558gr-qchep-th
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旋转玻色子星的普适关系

Universal relations for rotating Boson Stars

Christoph Adam, Jorge Castelo, Alberto García Martín-Caro, Miguel Huidobro, Ricardo Vázquez, Andrzej Wereszczynski

摘要:

玻色子星代表了一种假设的奇异类型的紧凑恒星物体,可以从当前和未来的GW探测器中合并双星的引力信号中观察到。在这项工作中,我们表明,转动玻色子星的转动惯量$I$,(无量纲)角动量$χ$和四极矩$Q$服从一个普遍的关系,适用于广泛的玻色子星模型。此外,得到的$I-χ-Q~$关系明显不同于其著名的中子星对应,为我们提供了一个明确的诊断工具,以区分玻色子星从普通的致密星或其他天体在GW的观测。这种普遍的(即模型无关的)关系也提供了一个有用的工具来探测广义相对论的强引力机制,并限制致密恒星内部物质的状态方程。

英文摘要:

Boson stars represent a hypothetical exotic type of compact stellar object that may be observed from the gravitational signal of coalescing binaries in current and future GW detectors. In this work we show that the moment of inertia $I$, the (dimensionless) angular momentum $χ$ and the quadrupole moment $Q$ of rotating boson stars obey a universal relation, valid for a wide set of boson star models. Further, the obtained $I-χ-Q~$ relation clearly differs from its famous neutron star counterpart, providing us with an unequivocal diagnostic tool to distinguish boson stars from ordinary compact stars or other celestial bodies in GW observations. Such universal (i.e. model-independent) relations also provide a useful tool to probe the strong gravity regime of general relativity and to constrain the equation of state of matter inside compact stars.

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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