The binary system containing the pulsar PSR 1913 plus 16 and ultra-violet and X-radiation from accreting magnetic white dwarfs

Details The binary system containing the pulsar PSR 1913 plus 16 and ultra-violet and X-radiation from accreting magnetic white dwarfs The binary system containing the pulsar PSR 1913 plus 16 and ultra-violet and X-radiation from accreting magnetic white dwarfs

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........13m&link_type=abstract

Ph.D. Thesis Illinois Univ., Urbana-Champaign.

Astronomy and Astrophysics

Astronomy

1

Binary Stars, Pulsars, Stellar Radiation, Ultraviolet Astronomy, White Dwarf Stars, X Ray Astronomy, Black Body Radiation, Bremsstrahlung, Cyclotron Frequency, Relativistic Plasmas, Stellar Mass Accretion

Scientific paper

Ways of determining the nature of the companion to the pulsar PSR 1913+16 from observations of the pulsar's orbit and the slow rate of the orbit's precession are discussed. Geometric constraints require that the companion be a black hole, a neutron star, a white dwarf, or a helium-main sequence star. A uniform, geometrically thin slab was used to approximate the post-shock region and determine the physical conditions behind the shock when matter from a companion star falls into a white dwarf. The emitted spectrum is also determined for a range of stellar masses, magnetic fields, and accretion rates. Analytic fits to cyclotron spectra from mildly relativistic plasmas over a frequency range from one to eighty times the cyclotron frequency are calculated and derived. Observations of hard and soft X-rays are used to determine the mass and magnetic field of a star and its accretion rate. X-ray observations of AM Her, SS Cyg, and U Gem are discussed.

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