Effects of scattering atmospheres on the pulse profiles of accreting x‐ray pulsars
作者:
Steven J. Sturner,
Charles D. Dermer,
期刊:
AIP Conference Proceedings
(AIP Available online 1994)
卷期:
Volume 308,
issue 1
页码: 495-498
ISSN:0094-243X
年代: 1994
DOI:10.1063/1.45928
出版商: AIP
数据来源: AIP
摘要:
Resonant enhancements in the magnetic Compton cross section can produce regions of limited extent in an x‐ray pulsar magnetosphere where the radiation force on electrons balances the gravitational force on protons. Infalling material outside the pulsar accretion column can collect in this region to form a radiation‐supported scattering atmosphere. We propose that these scattering atmospheres can explain energy‐dependent features in the observed pulse profiles of 4U 1626‐67 and 4U 1538‐52. Less complex pulse profiles will be observed at higher photon energies because the scattering atmospheres, which are supported by resonant Compton radiation pressure, become transparent to photons with energies greater than the cyclotron energy at the pulsar surface. ©1994 American Institute of Physics.
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