96 citations · 426 across the 20 of their papers we have counts for
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A possible mechanism for QPOs modulation in neutron star sources
Jiri Horak
It was pointed out by Paczynski (1987) that the X-ray luminosity of accreting neutron stars is very sensitive to the physical properties of the accretion flow close to the innermos…
Epicyclic oscillations of fluid bodies Paper II. Strong gravity
Marek A. Abramowicz, Omer M. Blaes, Jiri Horak +2
Fluids in external gravity may oscillate with frequencies characteristic of the epicyclic motions of test particles. We explicitly demonstrate that global oscillations of a slender…
The autoparametric 3:2 resonance in conservative systems
J. Horak
In the resonance model, high-frequency quasi-periodic oscillations (QPOs) are supposed to be a consequence of nonlinear resonance between modes of oscillations occurring within the…
On the role of strong gravity in polarization from scattering of light in relativistic flows
J. Horak, V. Karas
We study linear polarization due to scattering of light on a cloudlet of particles, taking into account the radiation drag and the gravitational pull exerted on them by a central b…
The correlations and anticorrelations in QPO data
M. A. Abramowicz, D. Barret, M. Bursa +4
Double peak kHz QPO frequencies in neutron star sources varies in time by a factor of hundreds Hz while in microquasar sources the frequencies are fixed and located at the line ν_2…
Cylinder Buckling: The Mountain Pass as an Organizing Center
Jiri Horak, Gabriel J. Lord, Mark A. Peletier
We revisit the classical problem of the buckling of a long thin axially compressed cylindrical shell. By examining the energy landscape of the perfect cylinder we deduce an estimat…