575 citations · 7k across the 182 of their papers we have counts for
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Descalarization bursts from Galactic supramassive neutron stars: a kHz continuous-wave target
José Carlos Olvera M., Daniela D. Doneva, Pablo Cerdá-Durán +2
In massive scalar-tensor gravity, a scalarized neutron star must shed its scalar hair as it collapses into a black hole. Using 3D simulations of a realistic rotating progenitor we…
Kerr Quasinormal Modes without Variable Separation: A Two-Dimensional Hyperboloidal Teukolsky Solver with Physics-Informed Neural Networks
Antonio Ferrer-Sánchez, Daniela D. Doneva, José D. Martín-Guerrero +4
We use physics-informed neural networks (PINNs) to solve the gravitational quasinormal-mode (QNM) eigenvalue problem for Kerr spacetime directly in the two-dimensional hyperboloida…
Rotating Fermion-Boson Stars in -squared Gravity
Saeed Fakhry, Jorge Castelo Mourelle, Nicolas Sanchis-Gual +3
Fermion-boson stars are compact equilibrium configurations composed of ordinary fermionic matter and a bosonic dark component interacting only through gravity. Such systems provide…
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…
Polarized Equatorial Emission around Kerr Black Holes with Synchronized Scalar Hair. I. Direct images
Valentin O. Deliyski, Galin N. Gyulchev, Daniela D. Doneva +2
We investigate the polarization properties of the direct images of a geometrically and optically thin accretion disk around fully self-consistent models of rotating Kerr black hole…
Rapidly Rotating Neutron Star Collapse in Massive Scalar-Tensor Theories
José Carlos Olvera M., Daniela D. Doneva, Pablo Cerdá-Durán +2
We present a full 3D numerical evolution code to study neutron stars in massive-scalar-tensor theories. The code is embedded in the Einstein Toolkit framework and its implementatio…