25 citations · 25 across the 3 of their papers we have counts for
4 papers
Thermal Stability and QNMs of a Hairy Black Hole in the Presence of a Monopole Field
George Koutsoumbas, Andri Machattou, Eleftherios Papantonopoulos
We study the stability of a generalization of the GHS-GM black hole in the presence of a dilaton and a monopole field. We find that the thermal behaviour of system depends on the s…
Formation of Bound States in Quintessence Alternative Theories
George Koutsoumbas, Andri Machattou, Eleftherios Papantonopoulos
We study the formation and behaviour of bound states formed outside the horizon of a black hole in the presence of quintessence matter. Calculating the Regge and Wheeler potential…
Magnetically Charged Euler-Heisenberg Black Holes with Scalar Hair
Thanasis Karakasis, George Koutsoumbas, Andri Machattou +1
We study the Einstein-Euler-Heisenberg theory in the presence of a self interacting scalar field, minimally coupled to gravity. We solve analytically the field equations for the ma…
Topological Black Holes with curvature induced scalarization in the extended scalar-tensor theories
Stella Kiorpelidi, George Koutsoumbas, Andri Machattou +1
We study the perturbative behaviour of topological black holes in the presence of a cosmological constant and a scalar field coupled to the Gauss-Bonnet term. We calculate both ana…