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Wormholes Immersed in Rotating Matter
Christian Hoffmann, Theodora Ioannidou, Sarah Kahlen +2
We demonstrate that rotating matter sets the throat of an Ellis wormhole into rotation, allowing for wormholes which possess full reflection symmetry with respect to the two asympt…
Static Orbits in Rotating Spacetimes
Lucas G. Collodel, Burkhard Kleihaus, Jutta Kunz
We show that under certain conditions an axisymmetric rotating spacetime contains a ring of points in the equatorial plane, where a particle at rest with respect to an asymptotic s…
Wormhole solutions with a complex ghost scalar field and their instability
Vladimir Dzhunushaliev, Vladimir Folomeev, Burkhard Kleihaus +1
We study compact configurations with a nontrivial wormholelike spacetime topology supported by a complex ghost scalar field with a quartic self-interaction. For this case, we obtai…
Excited Boson Stars
Lucas G. Collodel, Burkhard Kleihaus, Jutta Kunz
Axisymmetric rotating radially excited boson stars are analyzed. For several fixed parameter sets, the full sets of solutions are obtained. In contrast to the nodeless boson stars,…
Scalarization of neutron stars with realistic equations of state
Zahra Altaha Motahar, Jose Luis Blázquez-Salcedo, Burkhard Kleihaus +1
We consider the effect of scalarization on static and slowly rotating neutron stars for a wide variety of realistic equations of state, including pure nuclear matter, nuclear matte…
Testing Einstein-dilaton-Gauss-Bonnet gravity from the reflection spectrum of accreting black holes
Hao Zhang, Menglei Zhou, Cosimo Bambi +3
Einstein-dilaton-Gauss-Bonnet gravity is a theoretically well-motivated alternative theory of gravity emerging as a low-energy 4-dimensional model from heterotic string theory. Its…