Possible signatures of higher dimension in thin accretion disk around brane world black hole

TL;DR

This paper explores how higher-dimensional effects influence the observable properties of thin accretion disks around brane world black holes, revealing potential signatures of extra dimensions through disk temperature, luminosity, and efficiency changes.

Contribution

It introduces a detailed analysis of accretion disk characteristics in brane world black holes, highlighting how the tidal charge parameter affects observable disk properties, suggesting a way to detect higher-dimensional signatures.

Findings

Increased tidal charge raises disk temperature and luminosity.

Positive tidal charge leads to hotter, more luminous disks.

Negative tidal charge results in cooler, less luminous disks.

Abstract

We probe deeply into the characteristics of thin accretion disk surrounding black hole within the brane world paradigm. We investigate how model parameters affect the physical properties of the disk. Our findings indicate that as the tidal charge parameter inherited from the higher dimension increases, the energy flux, the radiation temperature, the spectral cutoff frequency, the spectral luminosity, and the conversion efficiency of the disk all increase, but the radius of the innermost stable circular orbit decreases. Compared to cases of the Kerr and Schwarzschild black holes, the disk is hotter and more luminous for positive tidal charge parameter, while it is cooler and less luminous for negative tidal charge parameter, which suggests the potential for probing possible signatures of higher dimension.