Abstract:Abstract. Two-dimensional structure of accretion columns in the radiation-diffusion limit is calculated for two possible geometries (filled and hollow cylinder) for mass accretion ratesṀ ranging from 10 17 to 1.2 × 10 18 g s −1 . The observed spectral hardening in the transient X-ray pulsars with increasingṀ can be reproduced by a Compton-saturated sidewall emission from optically thick magnetized accretion columns with taking into account the emission reflected from the neutron star atmosphere. AtṀ above some… Show more
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