November 23, 2011 Wednesday 15:30
Mehmet Hakan Erkut, Istanbul Kültür University
Neutron Stars and Black Holes as Sources of Millisecond Oscillations

Abstract:One of the most exciting discoveries within the last two decades of high-energy astrophysics was that of millisecond pulsations and kilohertz (kHz) quasi-periodic oscillations (QPOs) in the X-ray power spectra of neutron stars and black holes. In this talk, we address the observational properties of these high-energy and high-frequency quasi-periodic oscillations within a single model. Interpretation of QPO frequencies in terms of the characteristic frequencies associated with the strong gravity of the compact star is important and must be made carefully in order to reveal and test the physics of these exotic objects.