Choked accretion onto Kerr-Sen black holes in Einstein-Maxwell-dilaton-axion gravity

Abstract

We investigate the process of an ultrarelativistic fluid accreted onto axisymmetric Kerr-Sen black holes in Einstein-Maxwell-dilaton-axion theory. We obtain the solution describing the velocity potential of a stationary irrotational fluid with a stiff equation of state and the solution for the streamlined diagram of the quadrupolar flow. We also investigate how the solution's coefficients and the stagnation points are affected by the parameters. The injection rate, the ejection rate, and the critical angle are discussed in detail. We find that with an increasing dilaton parameter the ratio of the ejection rate to the injection rate increases and that the radiative efficiency is larger, while the redshift is lower, compared to the Kerr black hole.

25pages,10 figures

References in corpus (19)

• The Confrontation between General Relativity and Experiment
• Ultra-hard fluid and scalar field in the Kerr-Newman metric
• Accretion onto a black hole in a string cloud background
• Recurrent Acceleration in Dilaton-Axion Cosmology
• Accretion of Dark Matter onto a Moving Schwarzschild Black Hole: An Exact Solution
• Thin accretion disk luminosity and its image around rotating black holes in perfect fluid dark matter
• Stationary Charged Scalar Clouds around Black Holes in String Theory
• Accretion of the relativistic Vlasov gas onto a moving Schwarzschild black hole: Exact solutions
• Accretion of the Vlasov gas onto a Schwarzschild-like black hole
• Rigidly rotating ZAMO surfaces in the Kerr spacetime
• Thin accretion disks around a black hole in Einstein-Aether-scalar theory
• Axion-Dilaton Cosmology and Dark Energy
• Adiabatic accretion onto black holes in Einstein-Maxwell-scalar theory
• Choked accretion: from radial infall to bipolar outflows by breaking spherical symmetry
• Accretion disc around black hole in Einstein-$SU(N)$ non-linear sigma model
• Spherically-symmetric Accretion onto a Black Hole at the Center of a Young Stellar Cluster
• Choked accretion onto a Kerr black hole
• Phase-Transition Theory of Kerr Black Holes in Electromagnetic Field
• Exact solution for accretion onto a moving charged dilaton black hole

Cited by in corpus (4)

• Thin accretion disk and shadow of Kerr-Sen black hole in Einstein-Maxwell-dilaton-axion gravity
• Thin accretion disk around black hole in Einstein-Maxwell-scalar theory
• Probing Einstein-Maxwell-Scalar Black hole via Thin Accretion Disks and Shadows with EHT Observations of M87* and Sgr A*
• Thin accretion disk around Schwarzschild-like black hole in bumblebee gravity