arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2401.15134gr-qc
收藏

正则非最小磁黑洞的粒子动力学与阴影

Particle dynamics and shadow of a regular non-minimal magnetic black hole

Ahmad Al-Badawi, M. Q. Owaidat

AI总结:

本文分析非最小 EYM 正则磁黑洞周围无质量与有质量粒子的测地线、ISCO、稳定性及阴影,揭示磁荷与耦合参数对运动和阴影半径的影响。

摘要:

本文研究非最小 Einstein Yang Mills(EYM)理论中一个正则黑洞(BH)周围的测试粒子动力学,并考察该黑洞阴影。EYM 理论是一种曲率与非 Abel 规范场耦合的非最小耦合理论。我们针对无质量和有质量粒子,研究 EYM 黑洞中随参数变化的粒子运动。本工作给出了视界结构、光子半径,以及有质量粒子在 EYM 黑洞参数下的内稳定圆轨道(ISCO)。文中分析了在不同 EYM 黑洞参数取值下测试粒子的有效势以及可能轨道。在类时径向测地线中,我们发现当磁荷较小时,沿 EYM 黑洞类时径向测地线运动的粒子更为急促,因此比沿 Schwarzschild 黑洞测地线运动的粒子更快到达中心;然而,在磁荷较大时观察到相反效应。为研究 EYM 理论中黑洞的 ISCO、光子半径、轨道稳定性(Lyapunov 指数)以及作用于粒子的有效力,我们考察了模型参数的影响。最后,我们研究黑洞阴影,发现较高的磁荷值和非最小耦合参数会导致较小的阴影半径值。

英文摘要:

In this paper, we study the dynamics of a test particle around a regular black hole (BH) in a non-minimal Einstein Yang Mills (EYM) theory and examine the BH shadow. The EYM theory is a non-minimally coupled theory in which curvature couples to non-Abelian gauge fields. We investigate particle motion with parameters in EYM BH for massless and massive particles. This work provides the horizon structure, photon radius and inner stable circular orbit (ISCO) of a mass particle with EYM BH parameters. An analysis is provided of the effective potential as well as the possible orbits for test particles under various EYM BH parameters values. In timelike radial geodesics, we find that for smaller values of magnetic charge, particles following a timelike radial geodesic are hastier in EYM BH, and hence arrive at the center faster than those traveling a Schwarzschild BH geodesic. However, at larger values of the magnetic charge, the inverse effect is observed. The effect of model parameters is investigated in order to study the ISCO, photon radius, orbit stability (Lyapunov exponent), and effective force on particles for the BH in the EYM theory. Finally, we investigate the BH shadow. We find that higher magnetic charge values and non-minimal coupling parameters result in smaller shadow radius values.

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。

↑