Evening session - Parallel B
- Luigi Stella (INAF - Osservatorio di Roma)
Ms Sofie Fehlmann (University of Basel)
3/28/14, 4:30 PM
Neutron stars in low mass X-ray binary systems with an accretion flow of matter from the companion star have been observed to exhibit regular bursts. These so-called type I X-ray bursts are thermonuclear explosions occurring in the surface layers of neutron stars. After thousands of type I X-ray bursts, enough ashes have been accumulated and a rare superburst event may take place. Such an...
44. Testing the Impact of Surface Temperature Inhomogeneities on Quiescent Neutron Star Mass/Radius Determinations
Mr Khaled Elshamouty (University of Alberta)
3/28/14, 4:45 PM
Spectral analyses of quiescent neutron stars in X-ray binaries have been used to constrain the mass and radius of the neutron stars. A question not yet explored is the effect of undetected hot spots on the spectrum, and thus on the inferred mass and radius of a quiescent neutron star. We simulate light curves for hydrogen atmosphere neutron stars with hot spots, performing Monte Carlo...
Ms Aida Kirichenko (Ioffe Physical Technical Institute)
3/28/14, 5:00 PM
Recent discoveries of the Fermi mission have increased the number of known gamma-ray pulsars by a factor of twenty. Multiwavelength investigations of these objects are crucial for unveiling the pulsar emission nature. Because gamma-ray pulsars are typically nearby and energetic, they, in particular, appear to be promising targets for studies in X-ray and optical domains. We present new...
M. Bronzato de Avellar (IAG in San Paulo, Brasil)
3/28/14, 5:15 PM
We present an analysis of the energy and frequency dependence of the Fourier time lags of the hectoHertz quasi-periodic oscillations (QPOs) and of the QPOs at the frequency at which the power density spectrum shows a break in the neutron-star low-mass X-ray binary 4U 1636−53, using a large data set obtained with the Rossi X-ray Timing Explorer. We found that: (i) For the break frequency...