RT info:eu-repo/semantics/article
T1 Modified Kerr black holes surrounded by dark matter spike
A1 Capozziello, Salvatore
A1 Zare, Soroush
A1 Nieto Calzada, Luis Miguel
A1 Hassanabadi, Hassan
K1 Modified gravity
K1 Astrophysical black holes
K1 Dark matter density
K1 Gravitational lensing
K1 Black hole shadow
K1 22 Física
AB We study supermassive black holes (SMBH), surrounded by a dark matter (DM) spike, that can be found atthe centers of Milky Way and M87 galaxies and are accompanied by a specific kind of topological defect.The investigation is developed within the framework of Bumblebee Gravity with a global monopole (BGGM).The dark matter spike is described by a power-law density profile. Our main objective is to assess how thebackground arising from spontaneous Lorentz symmetry breaking and the presence of a global monopoleinfluence the properties of the Kerr BH within the region affected by the spike. Using a spherically symmetricstatic BH with BGGM properties as the seed metric, we construct a non-rotating spacetime with a DM spike,resulting in a BGGM-motivated Schwarzschild-like BH by solving the modified Tolman–Oppenheimer–Volkoffequations (TOV). Next, we extend this approach to the case of a rotating spacetime resulting in the BGGM-motivated Kerr-like BH (BGMKLBH). This approach allows us to explore the spacetime structure, and theBGMKLBH shadows. Then, using available observational data for the DM spike density and considering theeffects of BGGM on Sgr A∗ and M87∗ SMBHs, we analyze the shapes of their shadows and put constraints onthe BGGM parameter. Thus, we infer that the BGMKLBHs could be reliable candidates for the astrophysicalBHs
PB Elsevier
SN 2212-6864
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/79508
UL https://uvadoc.uva.es/handle/10324/79508
LA eng
NO Physics of the Dark Universe, 2025, vol. 50, p. 102065
NO Producción Científica
DS UVaDOC
RD 01-abr-2026