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Lensing and shadow of a black hole surrounded by a heavy accretion disk
Pedro V. P. Cunha, Nelson A. Eiró, Carlos A. R. Herdeiro +1
We consider a static, axially symmetric spacetime describing the superposition of a Schwarzschild black hole (BH) with a thin and heavy accretion disk. The BH-disk configuration is…
Dynamically and thermodynamically stable black holes in Einstein-Maxwell-dilaton gravity
Dumitru Astefanesei, Jose Luis Blázquez-Salcedo, Carlos Herdeiro +2
We consider Einstein-Maxwell-dilaton gravity with the non-minimal exponential coupling between the dilaton and the Maxwell field emerging from low energy heterotic string theory. T…
Charged Dirac perturbations on Reissner-Nordström-Anti-de Sitter spacetimes: quasinormal modes with Robin boundary conditions
Mengjie Wang, Carlos Herdeiro, Jiliang Jing
We study charged Dirac quasinormal modes (QNMs) on Reissner-Nordström-Anti-de Sitter (RN-AdS) black holes with generic Robin boundary conditions, by extending our earlier work of n…
A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
Carlos A. R. Herdeiro, João M. S. Oliveira, Eugen Radu
Recently, no-go theorems for the existence of solitonic solutions in Einstein-Maxwell-scalar (EMS) models have been established in arXiv:1902.07721. Here we discuss how these theor…
Black hole spontaneous scalarisation with a positive cosmological constant
Yves Brihaye, Carlos Herdeiro, Eugen Radu
A scalar field non-minimally coupled to certain geometric [or matter] invariants which are sourced by [electro]vacuum black holes (BHs) may spontaneously grow around the latter, du…
On the inexistence of self-gravitating solitons in generalised axion electrodynamics
Carlos A. R. Herdeiro, João M. S. Oliveira
Building upon the methods used recently, we establish the inexistence of self-gravitating solitonic solutions for both static and strictly stationary asymptotically flat spacetimes…