X-ray spectra of hercules X-1. III. Pulse phase dependence in the high-energy continuum

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/156565· OSTI ID:6502063

Pravdo, S H; Bussard, R W; Becker, R H; Boldt, E A; Holt, S S; Serlemitsos, P J

We have observed pulse phase-dependent spectral changes in the high-energy (>20 keV) continuum of Hercules X-1. Cyclotron absorption of underlying continua can reproduce the observed angular dependence in the high-energy cutoff. We discuss implications of this model, which include the possibility of determining the angular separation between the line of sight and the neutron star magnetic field if the absorbing electron spectrum is known.

• Research Organization: Department of Physics and Astronomy, University of Maryland
• OSTI ID: 6502063
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 225:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ELECTRON SPECTRA
MAGNETIC FIELDS
MATHEMATICAL MODELS
NEUTRON STARS
PULSARS
SPECTRA
STAR MODELS
STARS
X-RAY SPECTRA