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Thermal X-rays from Millisecond Pulsars: Constraining the Fundamental Properties of Neutron Stars
Slavko Bogdanov, Jonathan E. Grindlay, George B. Rybicki
Abridged) We model the X-ray properties of millisecond pulsars (MSPs) by considering hot spot emission from a weakly magnetized rotating neutron star (NS) covered by an optically-t…
Comptonization in the X-ray Spectra of Radio Millisecond Pulsars
Slavko Bogdanov, Jonathan E. Grindlay, George B. Rybicki
The majority of X-ray-detected rotation-powered millisecond pulsars (MSPs) appear to exhibit predominantly thermal emission, believed to originate from the heated magnetic polar ca…
Constraints on Neutron Star Properties from X-ray Observations of Millisecond Pulsars
Slavko Bogdanov, George B. Rybicki, Jonathan E. Grindlay
We present a model of thermal X-ray emission from hot spots on the surface of a rotating compact star with an unmagnetized light-element atmosphere. An application to ROSAT, Chandr…
X-rays from Radio Millisecond Pulsars: Comptonized Thermal Radiation
Slavko Bogdanov, Jonathan E. Grindlay, George B. Rybicki
X-ray emission from many rotation-powered millisecond pulsars (MSPs) is observed to be of predominantly thermal nature. In PSR J0437--4715, the nearest MSP known, an additional fai…
Improved Fokker-Planck Equation for Resonance Line Scattering
George B. Rybicki
A new Fokker-Planck equation is developed for treating resonance line scattering, especially relevant to the treatment of Lyman alpha in the early universe. It is a "corrected" for…
A Hydrogen Atmosphere Spectral Model Applied to the Neutron Star X7 in the Globular Cluster 47 Tucanae
Craig O. Heinke, George B. Rybicki, Ramesh Narayan +1
Current X-ray missions are providing high-quality X-ray spectra from neutron stars (NSs) in quiescent low-mass X-ray binaries (qLMXBs). This has motivated us to calculate new hydro…