104 citations · 2k across the 128 of their papers we have counts for
5 papers · 2 filters
Compact (A)dS Boson Stars and Shells
Betti Hartmann, Burkhard Kleihaus, Jutta Kunz +1
We present compact Q-balls in an (Anti-)de Sitter background in D dimensions, obtained with a V-shaped potential of the scalar field. Beyond critical values of the cosmological con…
Gauss-Bonnet boson stars
Betti Hartmann, Juergen Riedel, Raluca Suciu
We construct boson stars in (4+1)-dimensional Gauss-Bonnet gravity. We study the properties of the solutions in dependence on the coupling constants and investigate these in detail…
Stability of black holes and solitons in Anti-de Sitter space-time
Betti Hartmann
The stability of black holes and solitons in d-dimensional Anti-de Sitter space-time against scalar field condensation is discussed. The resulting solutions are "hairy" black holes…
AdS solitons with conformal scalar hair
Yves Brihaye, Betti Hartmann, Sardor Tojiev
We study spherically symmetric soliton solutions in a model with a conformally coupled scalar field as well as in full conformal gravity. We observe that a new type of limiting beh…
Geodesic motion in the space-time of a non-compact boson star
Valeria Diemer, Keno Eilers, Betti Hartmann +2
We study the geodesic motion of test particles in the space-time of non-compact boson stars. These objects are made of a self-interacting scalar field and -- depending on the scala…