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arXiv 2407.16441gr-qchep-th
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Born-Infeld 星与被标量云环绕的带电黑洞

Born-Infeld stars and charged black holes surrounded by scalar clouds

Yves Brihaye, Betti Hartmann

AI总结:

本文研究了带电静态恒星和黑洞上标量云的形成,发现 Reissner-Nordström 黑洞存在第二分支解,并证明在 Born-Infeld 电动力学背景下类星解可被标量化且标量云随电荷减小而更紧凑。

摘要:

我们讨论了在带电、球对称且静态的恒星和黑洞上标量云的形成。我们首先讨论了带有电荷和磁荷的 Reissner-Nordström 黑洞,并提出了证明存在第二分支解的新结果。此外,我们发现当标量云接近其最小可能平均半径时,磁荷的存在允许更小的质量和 Noether 荷。用 Born-Infeld (BI) 电动力学代替标准电动力学,该背景模型具有全局正则的类星解以及黑洞解。我们表明前者也可以被标量化,并且当减小 BI 星的电荷时,标量云变得更加紧凑。最后,我们讨论了标量化 BI 星背景下的磁偶极场,并表明该星的强引力场导致了显著变化。

英文摘要:

We discuss the formation of scalar clouds on charged, spherically symmetric and static stars and black holes. We first discuss Reissner-Nordström black holes with electric and magnetic charge and present new results demonstrating the existence of a second branch of solutions. Moreover, we find that the presence of the magnetic charge allows for smaller mass and Noether charge when the clouds are close to their minimal possible mean radius. Replacing standard electrodynamics by Born-Infeld (BI) electrodynamics, the background model possesses globally regular, star-like as well as black hole solutions. We show that the former can be scalarized as well and that the scalar clouds become more compact when decreasing the electric charge of the BI star. Finally, we discuss a magnetic dipole field in the background of the scalarized BI star and show that the strong gravitational field of this star leads to a significant change.

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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