6 papers
Hybrid Stars with Post-Merger Rotation Profiles
Kalin V. Staykov, Violetta Sagun, Lorenzo Cipriani +2
We study the effect of differential rotation on hybrid stars with the first-order deconfinement phase transition from hadronic to color superconducting quark matter. The differenti…
Phase transition structure of scalarized neutron stars: the effect of rotation and linear coupling
Kalin V. Staykov, Fethi M. RamazanoÄlu, Daniela D. Doneva +1
There has been a recent revival in understanding the spontaneous scalarization phenomenon in scalar-tensor gravity as a phase transition. Using the tools of the Landau theory, we n…
Differentially rotating neutron stars with dark matter cores
Lorenzo Cipriani, Violetta Sagun, Kalin V. Staykov +2
Dark matter is expected to accumulate inside neutron stars, modifying the structure of isolated stars and influencing both the dynamics of binary mergers and the evolution of the r…
Rotating scalarized black holes: the role of the coupling
Kalin V. Staykov, Daniela D. Doneva, Pedro G. S. Fernandes +1
We perform an in-depth analysis of rotating scalarized black holes in scalar-Gauss-Bonnet gravity, where scalarization is induced by the spacetime curvature. Our results show that…
Axisymmetric stability of neutron stars as extreme rotators in massive scalar-tensor theory
Alan Tsz-Lok Lam, Kalin V. Staykov, Hao-Jui Kuan +2
Differentially rotating scalarized neutron stars, mimickers of binary merger remnants, can possess an enormous angular momentum larger than what could possibly be sustained in a ne…
Neutron stars in extended scalar-Gauss-Bonnet gravity: the richness of the solution spectrum
Kalin V. Staykov, Peter Y. Yordanov, Daniela D. Doneva +1
Neutron stars are natural laboratories for testing gravity in the strong field regime. That is why the full spectrum of neutron star solutions in different modified theories should…