33 citations · 80 across the 6 of their papers we have counts for
6 papers
Polarimetric signatures of the photon ring of a black hole that is pierced by a cosmic axion string
Alexander Gußmann
A black hole image contains a bright ring of photons that have closely circled the black hole on their way from the source to the detector. Here, we study the photon ring of a rota…
Scattering of axial gravitational wave pulses by monopole black holes and QNMs
Alexander Gußmann
We study scattering of short Gaussian pulses of axial gravitational waves by a black hole that has swallowed one or more global monopoles. We show how the response of the black hol…
Bulk-boundary correspondence between charged, anyonic strings and vortices
Alexander Gußmann, Debajyoti Sarkar, Nico Wintergerst
We discuss a unified framework of dealing with electrically charged, anyonic vortices in 2+1 dimensional spacetimes and extended, anyonic string-like vortices in one higher dimensi…
Aharonov-Bohm protection of black hole's baryon/skyrmion hair
Gia Dvali, Alexander Gußmann
The baryon/skyrmion correspondence implies that the baryon number is encoded into a topological surface integral. Under certain conditions that we clarify, this surface integral ca…
Scattering of massless scalar waves by magnetically charged black holes in Einstein-Yang-Mills-Higgs theory
Alexander Gußmann
The existence of the classical black hole solutions of the Einstein-Yang-Mills-Higgs equations with non-abelian Yang-Mills-Higgs hair, which we will also refer to as "magnetic mono…
Skyrmion Black Hole Hair: Conservation of Baryon Number by Black Holes and Observable Manifestations
Gia Dvali, Alexander Gußmann
We show that the existence of black holes with classical skyrmion hair invalidates standard proofs that global charges, such as the baryon number, cannot be conserved by a black ho…