On optical appearance of Einstein-Maxwell-Æther black holes surrounded by various accretions

Abstract

In this paper, we investigate the effects of the æther field and the electric charge on the observed shadow of two types of charged black holes in the Einstein-Maxwell-Æther theory. By considering that the Einstein-Maxwell-Æther 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-Æther 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-Æther black holes with neutral Einstein-Æther black holes, we show that the charged Einstein-Æther black holes have smaller dark area, whereas wider lensed ring and photon ring. Comparing the charged Einstein-Æther black holes with Reissner-Nordstrom black hole gives a reverse effect.

21 pages, 13 figures

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Cited by in corpus (2)

• Investigating the shadows of new regular black holes with a Minkowski core: Effects of spherical accretion and core type differences
• Buchdahl bound, photon ring, ISCO and radial acceleration in Einstein-æther theory