On optical appearance of Einstein-Maxwell-{\AE}ther black holes surrounded by various accretions

TL;DR

This paper studies how the {\

Contribution

It introduces analysis of the optical appearance and shadow of charged Einstein-Maxwell-{\

Findings

Charged Einstein-{\

Charged black holes have smaller dark areas and wider rings.

Accretion flow models significantly influence the observed black hole images.

Abstract

In this paper, we investigate the effects of the {\ae}ther field and the electric charge on the observed shadow of two types of charged black holes in the Einstein-Maxwell-{\AE}ther theory. By considering that the Einstein-Maxwell-{\AE}ther black holes surrounded by the static/infalling spherical accretion flows, as well as an optically and geometrically thin disk accretion flow, we study the shadow luminosities and the observed specific intensity of the image for these various profiles of accretion flows. We find that in the thin disk accretion model the location and the emitted model of the accretion gas affect on the optical appearance of charged Einstein-{\AE}ther black holes in contrast to the spherical accretion flows. For a thin disk profile, we show that the observer will receive more intensity for an emitted model as Gaussian function when the innermost radiation radius lies in the innermost stable circular orbit. Finally, comparing the results of the charged Einstein-{\AE}ther black holes with neutral Einstein-{\AE}ther black holes, we show that the charged Einstein-{\AE}ther black holes have smaller dark area, whereas wider lensed ring and photon ring. Comparing the charged Einstein-{\AE}ther black holes with Reissner-Nordstrom black hole gives a reverse effect.