Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.x2004g&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Most of the EGRET γ-ray sources that have resisted identification for the last decade clearly have a Galactic origin. Neutron stars and their environment offer various ways to power γ-ray sources. Pulsed γ rays have been recorded from the open magnetosphere of a handful of pulsars, although the acceleration mechanisms and location are not understood yet. Unpulsed γ rays have been detected from a pulsar relativistic wind nebula in the extreme case of the Crab nebula and other associations, although not firm, look quite promising. γ rays are also highly expected from the freshly accelerated cosmic rays at the forward and reverse shocks of the surrounding supernova remnant. Recent population studies and multi-wavelength searches for counterparts, in particular new detections of energetic radio pulsars in the EGRET error boxes, bring forth the importance of neutron stars as counterpart candidates. The recent studies and their implications will be reviewed.
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