Thin accretion disk around a Kaluza-Klein black hole with squashed horizons

TL;DR

This paper investigates how the size of an extra dimension in a Kaluza-Klein black hole influences the properties of a surrounding thin accretion disk, revealing that larger extra dimensions reduce energy flux and luminosity.

Contribution

It introduces a detailed analysis of accretion disks around squashed Kaluza-Klein black holes, highlighting the impact of the extra dimensional scale on disk characteristics.

Findings

Energy flux decreases with larger extra dimension scale

Spectral luminosity and cut-off frequency decrease as the extra dimension grows

Inner disk border expands with increasing extra dimension parameter

Abstract

We study the accretion process in the thin disk around a squashed Kaluza-Klein black hole and probe the effects of the extra dimensional scale $\rho_0$ on the physical properties of the disk. Our results show that with the increase of the parameter $\rho_0$, the energy flux, the conversion efficiency, the radiation temperature, the spectra luminosity and the spectra cut-off frequency of the thin accretion disk decrease, but the inner border of the disk increases. This implies that the extra dimension scale imprints in the mass accretion process in the disk.