96 citations · 426 across the 20 of their papers we have counts for
20 papers
Reflection-asymmetric wormholes and their double shadows
Maciek Wielgus, Jiri Horak, Frederic Vincent +1
We discuss construction and observational properties of wormholes obtained by connecting two Reissner-Nordstrom spacetimes with distinct mass and charge parameters. These objects a…
Bright X-ray flares from Sgr A*
G. D. Karssen, M. Bursa, A. Eckart +4
We address a question whether the observed light curves of X-ray flares originating deep in galactic cores can give us independent constraints on the mass of the central supermassi…
Viscous Driving of Global Oscillations in Accretion Discs Around Black Holes
Ryan Miranda, Jiri Horak, Dong Lai
We examine the role played by viscosity in the excitation of global oscillation modes (both axisymmetric and non-axisymmetric) in accretion discs around black holes using two-dimen…
Corotation resonance and overstable oscillations in black-hole accretion discs: general-relativistic calculations
Jiri Horak, Dong Lai
We study the dynamics of spiral waves and oscillation modes in relativistic rotating discs around black holes. Generalizing the Newtonian theory, we show that wave absorption can t…
The perihelion of Mercury advance and the light bending calculated in (enhanced) Newton's theory
M. A. Abramowicz, G. F. R. Ellis J. Horak, M. Wielgus
We show that results of a simple dynamical gedanken experiment interpreted according to standard Newton's gravitational theory, may reveal that three-dimensional space is curved. T…
High-Frequency QPOs and Overstable Oscillations of Black-Hole Accretion Disks
Dong Lai, Wen Fu, David Tsang +2
The physical origin of high-frequency QPOs (HFQPOs) in black-hole X-ray binaries remains an enigma despite many years of detailed observational studies. Although there exists a num…