Abstract We have studied the steady state accretion process of perfect fluids onto a regular Hayward black hole (BH) corresponding to Schwarzschild spacetime. It has been found that the accretion rate of regular Hayward BH differ from Schwarzschild BH. The graphical results of our problem depend on fluid’s radial velocity u(r), speed of sound c s 2 and the mass accretion rate M ˙ . We see the physical behaviors of the BH family, where the fluid’s radial velocity stay positive as well as negative. The speed of sound is decreased as we increase the value of parameter l and also it is an increasing function of the radius r. The similar behavior is seen for the mass accretion rate.

中文翻译：

---

海沃德规则黑洞附近的天体物理吸积

摘要 我们研究了完美流体在与 Schwarzschild 时空相对应的规则 Hayward 黑洞 (BH) 上的稳态吸积过程。已经发现常规 Hayward BH 的吸积率不同于 Schwarzschild BH。我们问题的图形结果取决于流体的径向速度 u(r)、声速 cs 2 和质量吸积率 M ˙ 。我们看到了 BH 系列的物理行为，其中流体的径向速度保持正值和负值。随着我们增加参数 l 的值，声速降低，并且它是半径 r 的递增函数。对于质量吸积率，可以看到类似的行为。