PT Journal
AU Araujo Filho, AA
   Hassanabadi, H
   Heidari, N
   Kriz, J
   Zare, S
TI Gravitational traces of bumblebee gravity in metric-affine formalism
SO Classical and Quantum Gravity
JI Class. Quantum Gravity
PY 2024
BP 055003
EP 21pp
VL 41
IS 5
DI 10.1088/1361-6382/ad1712
LA English
DE bumblebee gravity; metric affine formalism; shadows
AB This work explores various manifestations of bumblebee gravity within the metric-affine formalism. We investigate the impact of the Lorentz violation parameter, denoted as X, on the modification of the Hawking temperature. Our calculations reveal that as X increases, the values of the Hawking temperature attenuate. To examine the behavior of massless scalar perturbations, specifically the quasinormal modes, we employ the Wentzel-Kramers-Brillouin method. The transmission and reflection coefficients are determined through our calculations. The outcomes indicate that a stronger Lorentz-violating parameter results in slower damping oscillations of gravitational waves. To comprehend the influence of the quasinormal spectrum on time-dependent scattering phenomena, we present a detailed analysis of scalar perturbations in the time-domain solution. Additionally, we conduct an investigation on shadows, revealing that larger values of X correspond to larger shadow radii. Furthermore, we constrain the magnitude of the shadow radii using the EHT horizon-scale image of SgrA* . Finally, we calculate both the time delay and the deflection angle.
ER