Accretion onto a Schwarzschild-like black hole in Einstein-Grisaru-Zanon gravity
Abstract
Abstract We investigate the matter accretion of well-known fluids flowing onto a Schwarzschild-like black hole in Einstein–Grisaru–Zanon (EGZ) gravity. Within the framework of EGZ gravity, we can determine the accretion properties of fluids that have been extensively studied, including ultra-stiff fluid (USF), ultra-relativistic fluid (URF), radiation fluid (RF) and sub-relativistic fluid (SRF) by employing the dynamical approach. In this perspective, we have considered the steady-state and spherically symmetric accretion onto a Schwarzschild-like black hole in EGZ gravity. For this purpose, we have classified the isothermal types of fluid in the context of equations of state (EOS). Moreover, we have introduced the polytropic test fluid with accretion disks. The mass accretion rate is also investigated near a Schwarzschild-like black hole in EGZ gravity. It is interesting to note that the mass accretion rate of the Schwarzschild-like black hole in EGZ gravity exhibits a more typical behavior than the ordinary Schwarzschild black hole, which has been presented graphically under the effect of the involved black hole parameters. Furthermore, we have observed that the parameter involved in $$\gamma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>γ</mml:mi> </mml:math> influences the properties of accretion near a black hole horizon.