近日，巴基斯坦巴哈瓦尔布尔伊斯兰大学的H. Rehman与G. Abbas合作并取得一项新进展。经过不懈努力，他们在引力解耦理论框架下对毛状黑洞周围吸积进行研究。相关研究成果已于2023年12月15日在国际知名学术期刊《中国物理C》上发表。

该研究团队在引力解耦的框架下，深入研究了静态球对称毛状黑洞的天体物理吸积过程。为了实现这一目标，他们详细分析了几种类型完美流体的吸积过程，包括多变流体、超硬流体、超相对论流体、辐射流体以及亚相对论等温流体。通过运用哈密顿动力学方法，研究人员成功地确定了吸积到黑洞上的各种流体形式的临界点或声速点。

此外，研究人员还给出了多种流体溶液的封闭形式，并用相图曲线进行了表示。在引力解耦的框架下，他们还对静态球对称毛状黑洞的质量吸积速率进行了估计。这些发现有助于在物理物质吸积到黑洞上时限制黑洞的参数。

附：英文原文

Title: Accretion around a hairy black hole in the framework of gravitational  decoupling theory

Author: H. Rehman, G. Abbas

Issue&Volume: 2023-12-15

Abstract: We investigate astrophysical accretion onto a static and spherically symmetric hairy black hole within the framework of gravitational decoupling. To achieve this goal, we examine the accretion procedure for several types of perfect fluids, including polytropic fluid and ultra-stiff, ultra-relativistic, radiation, and sub-relativistic isothermal fluids. Moreover, we determine the critical or sonic points for numerous fluid forms that are accreting onto the black hole by utilizing the Hamiltonian dynamical approach. Additionally, the closed form of the solutions are presented for a number of fluids, which are represented in phase diagram curves. We estimate the mass accretion rate of a static and spherically symmetric hairy black hole within the framework of gravitational decoupling. These findings are helpful in constraining the parameters of black holes while physical matter accretes onto the black holes.

DOI: 10.1088/1674-1137/ad010e

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ad010e