Accretion of matter of a new bumblebee black hole

TL;DR

This paper studies how a new black hole solution in bumblebee gravity influences accretion phenomena and observable signatures, revealing modifications in shadow size and light deflection due to Lorentz violation.

Contribution

It introduces a static black hole in bumblebee gravity and analyzes its impact on accretion and optical features using ray tracing and emission models.

Findings

Larger Lorentz-violating parameters enlarge the black hole shadow.

Optical features shift outward with increasing parameter values.

Observed intensity diminishes due to gravitational redshift and Doppler effects.

Abstract

We investigate how the newly obtained static black hole in bumblebee gravity affects the behavior of accreting matter and its observable signatures. The Lorentz-violating parameter that characterizes this geometry modifies photon trajectories and shifts the location of the critical curve that defines the shadow. Using ray tracing, we examine light deflection, the structure of direct emission, lensing rings, and photon rings, and we explore three thin-disk emission models--starting at the ISCO, at the photon sphere, and at the event horizon--together with static and infalling spherical accretions. Larger values of this parameter enlarge the shadow, move all optical features outward, and suppress the observed intensity through gravitational redshift, with additional dimming produced by Doppler effects for infalling matter