176 citations · 276 across the 10 of their papers we have counts for
10 papers
Radiative GRMHD simulations of puffy accretion discs: Numerical versus analytical models of sub-Eddington accretion
Debora Lančová, Maciek Wielgus, Marek Abramowicz +6
A widely accepted picture of an accretion flow in the luminous soft spectral state of X-ray binary systems is a geometrically thin disc structure much like the classic analytic sol…
Lense-Thirring precession of neutron-star accretion flows: Relativistic versus classical precession
Gabriel Török, Martin Urbanec, Monika Matuszková +5
The vertical (Lense-Thirring) precession of the innermost accretion flows has been discussed as a sensitive indicator of the rotational properties of neutron stars (NSs) and their…
Accretion tori around rotating neutron stars II: Oscillations and precessions
Monika Matuszková, Gabriel Török, Kateřina Klimovičová +7
The four characteristic oscillation frequencies of accretion flows are, in addition to the Keplerian orbital frequency, often discussed in the context of the time variability of th…
Accretion tori around rotating neutron stars I: Structure, shape and size
Monika Matuszková, Gabriel Török, Debora Lančová +7
We present a full general relativistic analytic solution for a radiation-pressure supported equilibrium fluid torus orbiting a rotating neutron star (NS). Previously developed anal…
Oscillations of Fluid Tori around Neutron Stars
Eva Šrámková, Monika Matuszková, Kateřina Klimovičová +7
We examine the influence of quadrupole moment of a slowly rotating neutron star (NS) on the oscillations of a fluid accretion disk (torus) orbiting a compact object the spacetime a…
Mass of the active galactic nucleus black hole XMMUJ134736.6+173403
Kateřina Goluchová, Gabriel Török, Eva Šrámková +3
A recent study of the X-ray source XMMUJ134736.6+173403 has revealed a strong quasi-periodic modulation of the X-ray flux. The observation of two quasiperiodic oscillations (QPOs)…
Constraining models of twin peak quasi-periodic oscillations with realistic neutron star equations of state
Gabriel Török, Kateřina Goluchová, Martin Urbanec +8
Twin-peak quasi-periodic oscillations (QPOs) are observed in the X-ray power-density spectra of several accreting low-mass neutron star (NS) binaries. In our previous work we have…
eXTP -- enhanced X-ray Timing and Polarimetry Mission
S. N. Zhang, M. Feroci, A. Santangelo +181
eXTP is a science mission designed to study the state of matter under extreme conditions of density, gravity and magnetism. Primary targets include isolated and binary neutron star…
Twin peak quasi-periodic oscillations as signature of oscillating cusp torus
Gabriel Török, Kateřina Goluchová, Jiří Horák +4
Serious theoretical effort has been devoted to explain the observed frequencies of twin-peak quasi-periodic oscillations (HF QPOs) observed in low-mass X-ray neutron star binaries.…
Internal resonance in non-linear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs
J. Horak, M. A. Abramowicz, W. Kluzniak +2
We explore some properties of twin kilohertz quasiperiodic oscillations (QPOs) in a simple toy-model consisting of two oscillation modes coupled by a general nonlinear force. We ex…