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Gamma ray pulsarsData from the SAS-2 high-energy gamma-ray experiment reveal the existence of four pulsars emitting photons above 35 MeV. An attempt is made to explain the gamma-ray emission from these pulsars in terms of an electron-photon cascade that develops in the magnetosphere of the pulsar. Although there is very little material above the surface of the pulsar, the very intense magnetic fields (10 to the 12th power gauss) correspond to many radiation lengths which cause electrons to emit photons by magnetic bremsstrahlung and which cause these photons to pair-produce. The cascade develops until the mean photon energy drops below the pair-production threshold which is in the gamma-ray range; at this stage, the photons break out from the source.
Document ID
19770014043
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Oegelman, H.
(Middle East Technical Univ. Ankara, Turkey)
Ayasli, S.
(Middle East Technical Univ. Ankara, Turkey)
Hacinliyan, A.
(Middle East Technical Univ. Ankara, Turkey)
Date Acquired
August 8, 2013
Publication Date
January 1, 1977
Publication Information
Publication: NASA. Goddard Space Flight Center The Struct. and Content of the Galaxy and Galactic Gamma Rays
Subject Category
Astrophysics
Accession Number
77N20987
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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