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arXiv 2310.04053gr-qc
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耦合非线性电动力学场的Reissner-Nordström黑洞周围的吸积盘

Accretion disk around Reissner-Nordström black hole coupled with a nonlinear electrodynamics field

G. Abbas, H. Rehman, Tao Zhu, Qiang Wu, G. Mustafa

AI总结:

本研究针对耦合非线性电动力学场的Reissner-Nordström黑洞,利用等温流体分析其周围粒子测地线运动与吸积特性,明确了黑洞参数与电荷对圆测地线和最大吸积率的影响。

摘要:

物质在巨大天体附近积聚的现象被称为吸积。引力能量会随着物质落入致密天体而释放出来。中子星、白矮星和黑洞等天体周围的吸积过程因其能将引力能转化为辐射而具有重要意义。本研究利用等温流体,研究了球对称、耦合非线性电动力学场的Reissner-Nordström黑洞周围的粒子测地线运动与吸积过程。吸积过程中盘状结构的形成源于黑洞附近粒子的测地线运动。研究可确定圆轨道、辐射通量能量、辐射效率和辐射温度。本研究聚焦于检验赤道平面内具有稳定圆轨道的粒子,通过回复力分析粒子受到的微扰,以及粒子在致密天体周围的振荡行为。我们还分析了流体的临界流动与最大吸积率。研究结果揭示了黑洞参数$\zeta$与电荷$q$如何影响耦合非线性电动力学的Reissner-Nordström黑洞的粒子圆测地线与最大吸积率。

英文摘要:

The phenomenon by which matter accumulates in the vicinity of a huge celestial object is known as accretion. The gravitational energy is excreted as a consequence of infalling matter onto compact objects. The accretion procedure around celestial bodies like neutron stars, white dwarfs, and black holes has considerable importance because of its ability to transform gravitational energy into radiation. This study investigates the particle's geodesic motion and accretion around the spherically symmetric Reissner-Nordström black hole coupled with a nonlinear electrodynamics field utilizing isothermal fluid. The formation of the disc-like structure in the accretion process arises from the geodesic motion exhibited by particles near the black hole. The circular orbits, radiant flux energy, radioactive efficiency, and radiant temperature, can be determined. Our study focuses on the examination of particles exhibiting stable circular orbits within the equatorial plane. We analyze the perturbations experienced by particles throughout employing restoring forces and the oscillatory behavior of the particles around a compact object. We conduct an analysis of the fluid's critical flow and maximum accretion rate. Our results show how the black hole parameter $ζ$ and charge $q$ affect the circular geodesic of particles and the maximum accretion rate of the Reissner-Nordström black hole coupled with nonlinear electrodynamics.

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