Search Publications

On the High-Energy Gamma-Ray Signature of Cosmic-Ray Sources

Ormes, J. F.; Ozel, M. E.; Morris, D. J.

If cosmic rays are accelerated by strong shocks, then cosmic-ray sources should be characterized by spectra, dN/dE is proportional to p^-(2.0-2.2)^, reflecting the strength of those shocks. This is expected from the "standard leaky box" model of cosmic-ray propagation in which the source spectra are harder than the observed spectra because higher …

Search for Linear Polarization in Gamma-Ray Sources: Possible Evidence for the VELA Pulsar

Caraveo, P. A.; Bignami, G. F.; Mitrofanov, I. +1 more

The use of the azimuthal distribution of planes containing e(+)/e(-) pairs from high-energy photon materialization to investigate the nature of gamma-ray sources is discussed. Analytical work done on COS B data for bright COS B sources (Vela, Crab, and Geminga) and for a reference background region is presented along with results which are indicat…