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Lower limits on the maximum orbital frequency around rotating strange stars
D. Gondek-Rosinska, N. Stergioulas, T. Bulik +2
Observations of kHz quasi-periodic oscillations (QPOs) in the X-ray fluxes of low-mass X-ray binaries (LMXBs) have been used in attempts to constrain the external metric of the com…
The physics of kHz QPOs---strong gravity's coupled anharmonic oscillators
Wlodek Kluzniak, Marek Artur Abramowicz
We explain the origin of the puzzling high frequency peaks (QPOs) in the variability power spectra of accreting neutron stars and black holes as a non-linear 1:2 or 1:3 resonance b…
Coalescence of a strange star with a black hole
William H. Lee, Jon Nix, Wlodzimierz Kluzniak
We present the first numerical results on the binary coalescence of a quark star with a black hole, obtained with a 3-D Newtonian smooth particle hydro (SPH) code. The star is init…