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The Great Impersonation: -Solitons as Prototypical Black Hole Microstates
Alexandru Dima, Pierre Heidmann, Marco Melis +2
We analyze a new class of static, smooth geometries in five-dimensional supergravity, dubbed -solitons. They carry the same mass and charges as four-dimensional Reissn…
Nonradial stability of topological stars
Alexandru Dima, Marco Melis, Paolo Pani
Topological stars are regular, horizonless solitons arising from dimensional compactification of Einstein-Maxwell theory in five dimensions, which could describe qualitative proper…
Growing black-hole hair in nonminimally coupled biscalar gravity
Chloe Richards, Alexandru Dima, Deborah Ferguson +1
Black holes offer a unique laboratory for fundamental physics and are crucial for probing theories beyond Einstein's theory of General Relativity. In this paper, we consider 4D eff…
Spectroscopy of magnetized black holes and topological stars
Alexandru Dima, Marco Melis, Paolo Pani
We study the linear response of four dimensional magnetized black holes and regular topological stars arising from dimensional compactification of Einstein-Maxwell theory in five d…
Black Holes in Massive Dynamical Chern-Simons gravity: scalar hair and quasibound states at decoupling
Chloe Richards, Alexandru Dima, Helvi Witek
Black holes have a unique sensitivity to the presence of ultralight matter fields or modifications of the underlying theory of gravity. In the present paper we combine both feature…
Dynamical Chameleon Neutron Stars: stability, radial oscillations and scalar radiation in spherical symmetry
Alexandru Dima, Miguel Bezares, Enrico Barausse
Scalar-tensor theories whose phenomenology differs significantly from general relativity on large (e.g. cosmological) scales do not typically pass local experimental tests (e.g. in…