What Can Be Learned About Cosmic Rays with GLAST?

Details What Can Be Learned About Cosmic Rays with GLAST? What Can Be Learned About Cosmic Rays with GLAST?

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....3..515a&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

After decades of cosmic-ray research, the sites where cosmic-ray nuclei are accelerated remain unknown. While evidence is mounting that supernova remnants accelerate cosmic-ray electrons to very-high energies, EGRET observations of remnants have not provided clear evidence that nuclei are also accelerated in these objects. However, observations with GLAST may provide the first crucial evidence that a portion of the gamma-ray spectra of supernova remnants is produced by the decay of neutral pions, that this gamma-ray emission is associated with high-density regions around the remnants, and, hence, that supernova remnants accelerate cosmic-ray nuclei. We have simulated the spectral and spatial results that will be obtained for the remnant Cygni using data from a one-year all-sky survey with GLAST. The results emphasize that the superior angular resolution and gamma-ray flux sensitivity of GLAST should make it easy to determine that supernova remnants accelerate cosmic-ray nuclei.

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