Observational Sequences of Randall-Sundrum Black Holes

TL;DR

This paper examines the properties of accretion disks around Randall-Sundrum black holes, comparing their energy flux, temperature, and spectral distribution with Schwarzschild black holes, and confirms consistency with general relativity predictions using astrophysical data.

Contribution

It provides a detailed analysis of accretion disk characteristics around RS black holes and validates the model against observational data, extending previous theoretical work.

Findings

Accretion disk energy flux matches GR predictions.

Spectral energy distribution aligns with Schwarzschild black holes.

Model consistent with observations of Cygnus X-1 and Sgr A*.

Abstract

We consider the spherically symmetric black hole solution of the Randall-Sundrum (RS) model. This asymptotically-Schwarzschild solution was found by Abdolrahimi, Cation, Page and Yaghoobpour-Tari (ACPY-solution). We investigate the specific properties of the accretion disk around ACPY black hole having astrophysical size and mass. The energy flux and temperature distribution are obtained and compared with the Schwarzschild ones. We also present the spectral energy distribution of the accretion disk around RS black holes, when the transfer function is taken into account. Thus we confirm a full agreement of the accretion rate in RS model with the GR predictions. Using recent data on the high-mass X-ray binary Cygnus X-1 and on the Galactic centre black hole candidate Sgr A* we model the accretion in the RS model.