RT info:eu-repo/semantics/article
T1 Accretion disk luminosity and topological characteristics for a Schwarzschild black hole surrounded by a Hernquist dark matter halo
A1 Nieto Calzada, Luis Miguel
A1 Hosseinifar, Farokhnaz
A1 Boshkayev, Kuantay A.
A1 Zare, Soroush
A1 Hassanabadi, Hassan
K1 Black hole
K1 Dark matter
K1 Accretion disk
K1 Luminosity
K1 Topological characteristics
K1 2212 Física Teórica
AB In this work, we analyze some characteristics and gravitational signatures of the Schwarzschild black hole immersed in a Hernquist dark matter halo. We determine the black hole’s remnant radius and mass, which provide useful residual information at the end of its evaporation, and we then explore the luminosity of the accretion disk for the model under study. In this way, we determine the key orbital parameters of the test particles within the accretion disk, such as angular velocity, angular momentum, energy, and the radius of the innermost stable circular orbit, based on the dark matter model parameters. We also numerically estimate the accretion disk’s efficiency in converting matter into radiation. We also demonstrate that dark matter, which significantly alters the geometry surrounding a Schwarzschild black hole, influences the accretion disk’s radiative flux, temperature, differential luminosity, and spectral luminosity. The stability of a black hole spacetime is determined in the eikonal regime. The Lyapunov exponent is also analyzed to quantify the stability of the particle regime and to demonstrate the infall into or escape from the black hole to infinity, as well as the quasi-normal modes. Finally, some properties of black holes are studied from a topological perspective.
PB Elsevier
SN 2212-6864
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/80509
UL https://uvadoc.uva.es/handle/10324/80509
LA eng
NO Physics of the Dark Universe, 2025, vol. 50, p. 102151
NO Producción Científica
DS UVaDOC
RD 13-dic-2025