TY  - JOUR
AU  - Araujo Filho, A. A.
AU  - Hassanabadi, H.
AU  - Heidari, N.
AU  - Kriz, J.
AU  - Zare, S.
PY  - 2024
DA  - 2024//
TI  - Gravitational traces of bumblebee gravity in metric-affine formalism
T2  - Class. Quantum Gravity
JO  - Classical and Quantum Gravity
SP  - 055003
EP  - 21pp
VL  - 41
IS  - 5
PB  - IOP Publishing Ltd
KW  - bumblebee gravity
KW  - metric affine formalism
KW  - 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.
SN  - 0264-9381
UR  - https://arxiv.org/abs/2305.18871
UR  - https://doi.org/10.1088/1361-6382/ad1712
DO  - 10.1088/1361-6382/ad1712
LA  - English
N1  - WOS:001152994800001
ID  - AraujoFilho_etal2024
ER  -