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X-ray binaries in Sculptor
Thomas J. Maccarone, Arunav Kundu, Stephen E. Zepf +2
We report the results of a deep Chandra survey of the Sculptor dwarf spheroidal galaxy. We find five X-ray sources with L_X of at least 6*10^33 ergs/sec with optical counterparts e…
The Energy Dependence of Neutron Star Surface Modes and X-ray Burst Oscillations
Anthony L. Piro, Lars Bildsten
We calculate the photon energy dependence of the pulsed amplitude of neutron star (NS) surface modes. Simple approximations demonstrate that it depends most strongly on the burstin…
Shear Waves and Giant Flare Oscillations from Soft Gamma-Ray Repeaters
Anthony L. Piro
Recent observations of giant flares from soft gamma-ray repeaters have exhibited multiple 25-150 Hz oscillations. Frequencies in this range are expected for toroidal shear waves in…
The discovery of X-ray binaries in the Sculptor Dwarf Spheroidal Galaxy
Thomas J. Maccarone, Arunav Kundu, Stephen E. Zepf +2
We report the results of a deep Chandra survey of the Sculptor dwarf spheroidal galaxy. We find five X-ray sources with of at least ergs/sec with optical cou…
White Dwarf Heating and Subsequent Cooling in Dwarf Nova Outbursts
Anthony L. Piro, Phil Arras, Lars Bildsten
We follow the time dependent thermal evolution of a white dwarf (WD) undergoing sudden accretion in a dwarf nova outburst, using both simulations and analytic estimates. The post-o…
Surface Modes on Bursting Neutron Stars and X-ray Burst Oscillations
Anthony L. Piro, Lars Bildsten
Accreting neutron stars (NSs) often show coherent modulations during type I X-ray bursts, called burst oscillations. We consider whether a nonradial mode can serve as an explanatio…