%0 Journal Article
%T Gravitational traces of bumblebee gravity in metric-affine formalism
%A Araujo Filho, A. A.
%A Hassanabadi, H.
%A Heidari, N.
%A Kriz, J.
%A Zare, S.
%J Classical and Quantum Gravity
%D 2024
%V 41
%N 5
%I IOP Publishing Ltd
%@ 0264-9381
%G English
%F AraujoFilho_etal2024
%O WOS:001152994800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5925), last updated on Sun, 11 Feb 2024 18:21:20 +0000
%X 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.
%K bumblebee gravity
%K metric affine formalism
%K shadows
%R 10.1088/1361-6382/ad1712
%U https://arxiv.org/abs/2305.18871
%U https://doi.org/10.1088/1361-6382/ad1712
%P 055003-21pp