Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aas..meet.....r&link_type=abstract
American Astronomical Society, Meeting, Cambridge, MA, Jan. 1980, Paper. 31 p. Research supported by the United States-Israel B
Astronomy and Astrophysics
Astronomy
Binary Stars, Pulsars, Spaceborne Astronomy, Stellar Radiation, X Ray Spectra, X Ray Stars, Apsides, Heao 2, Stellar Motions, Stellar Rotation, Stellar Structure
Scientific paper
Progress made over the last decade in the understanding of the binary X-ray pulsars is reviewed. The characteristics of the pulse profiles of the known binary X-ray pulsars are discussed, and observed variations in pulse period corresponding to the spin-up of the neutron star are considered. Determinations of the orbits and binary system parameters of the binary X-ray pulsars from measurements of pulse arrival times are then examined. Attention is also given to current problems in binary X-ray pulsars, including the apsidal motion test, which allows the determination of the mass distribution within a star, the X-ray source 4U 1626-67, which is believed to be a highly compact binary X-ray source, and the observation of very faint X-ray pulsars with the Einstein Observatory.
Joss Paul C.
Rappaport Saul
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