176 citations · 3.9k across the 153 of their papers we have counts for
6 papers · 1 filter
To stealth or not to stealth: Thermodynamics of stealth black holes
Athanasios Bakopoulos, Thanasis Karakasis, Eleftherios Papantonopoulos
Using Euclidean methods we investigate the thermodynamics of stealth black hole solutions, which are solutions that geometrically are indistinguishable from those of general relati…
Nonlinear Scalarization of Schwarzschild Black Hole in Scalar-Torsion Teleparallel Gravity
P. A. González, Eleftherios Papantonopoulos, Joaquín Robledo +1
We consider a scalar field coupled to the torsion in Teleparallel Gravity with a coupling function that does not allow for a tachyonic instability to occur, and it leads to the for…
Using the shadow of a black hole to examine the energy exchange between axion matter and a rotating black hole
Xiao-Mei Kuang, Yuan Meng, Eleftherios Papantonopoulos +1
We find that a \textit{slowly} rotating axion-modified black hole resulting from the backreaction of an axion field on a rotating Kerr black hole can have a \textit{D-shaped} shado…
Massive Scalar Field Perturbations of Black Holes Immersed in Chaplygin-Like Dark Fluid
Ramón Bécar, P. A. González, Eleftherios Papantonopoulos +1
We consider massive scalar field perturbations in the background of black holes immersed in Chaplygin-like dark fluid (CDF), and we analyze the photon sphere modes, the de Sitter m…
Quasinormal modes and bound states of massive scalar fields in wormhole spacetimes
Sebastián Alfaro, P. A. González, Diego Olmos +2
In this work we explore the propagation of massive scalar fields on some wormhole backgrounds. On one side, we consider the Bronnikov-Ellis wormhole solution and wormhole geometrie…
Exact black holes in string-inspired Euler-Heisenberg theory
Athanasios Bakopoulos, Thanasis Karakasis, Nick E. Mavromatos +2
We consider higher-order derivative gauge field corrections that arise in the fundamental context of dimensional reduction of String Theory and Lovelock-inspired gravities and obta…