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arXiv 2103.14912gr-qc
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Kerr-(A)dS时空中自旋粒子的阿申巴赫效应

Aschenbach effect for spinning particles in Kerr-(A)dS spacetime

Ali Vahedi, Jafar Khodagholizadeh, Arman Tursunov

摘要:

在局部非旋转参照系中,测试粒子围绕快速旋转的黑洞旋转的速度梯度的非单调行为被称为阿申巴赫效应。这种效应可以作为快速旋转的黑洞的一个显著特征,对天体物理学黑洞自旋的测量有潜在的用处。本文推广了我们以前对自旋粒子围绕具有非零宇宙学常数的旋转黑洞运动的研究。我们表明,粒子的自旋$s$和宇宙学常数$Λ$修改的临界值的黑洞自旋$a_c$,可以观察到的Aschenbach效应; $a_c$可以增加或减少取决于$s$和$Λ$的迹象。我们还发现粒子的自旋$s$可以模拟宇宙学常数$Λ$对给定的$a_c$的影响,从而导致在Aschenbach效应中$s$,$Λ$和$a_c$的测量不一致。

英文摘要:

A non-monotonic behavior of the velocity gradient of a test particle revolving around a rapidly rotating black hole in the locally non-rotating frame of reference is known as the Aschenbach effect. This effect can serve as a distinguishing signature of rapidly rotating black holes, being potentially useful for the measurements of the astrophysical black hole spins. This paper is the generalization of our previous research to the motion of spinning particles around a rotating black hole with non-zero cosmological constant. We show that both the particle's spin $s$ and the cosmological constant $Λ$ modify the critical value of the black hole spin $a_c$, for which the Aschenbach effect can be observed; $a_c$ can increase or decrease depending on the signs of $s$ and $Λ$. We also found that the particle's spin $s$ can mimic the effect of the cosmological constant $Λ$ for a given $a_c$, causing thus a discrepancy in the measurements of $s$, $Λ$ and $a_c$ in the Aschenbach effect.

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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