Luminosity, redshift and gas abundance in general relativistic radiation hydrodynamics

TL;DR

This paper investigates how luminosity, redshift, and gas abundance are interconnected in spherical, relativistic accretion flows, revealing correlations and the gas's significant role in low-redshift sources.

Contribution

It provides a numerical analysis of relativistic radiation hydrodynamics for accretion flows, highlighting the relationship between luminosity, redshift, and gas content.

Findings

Gas can make up to one third of the total mass in bright low-redshift sources.

Gas abundance decreases to 1/30 near the Eddington luminosity.

Luminosity, redshift, and gas abundance are correlated in the studied flows.

Abstract

Quasi-stationary flows of gas accreting onto a compact center are analyzed in the framework of general-relativistic radiation hydrodynamics, under assumptions of spherical symmetry and thin gas approximation. Numerical investigation shows that luminosity, redshift and gas abundance are correlated. The gas can constitute up to one third of the total mass of brightest low-redshift sources, but its abundance goes down to 1/30 for sources with luminosities close to the Eddington limit.