Cosmic ray albedo gamma rays from the quiet sun

Details Cosmic ray albedo gamma rays from the quiet sun Cosmic ray albedo gamma rays from the quiet sun

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3137..542s&link_type=abstract

In NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop p 542-549 (SEE N92-21874 12-90)

Computer Science

1

Cosmic Ray Albedo, Cosmic Rays, Galactic Cosmic Rays, Gamma Ray Spectra, Gamma Rays, Interplanetary Magnetic Fields, Photosphere, Solar Magnetic Field, Solar Radiation, Energy Spectra, Gamma Ray Telescopes, Solar Atmosphere, Solar Corona

Scientific paper

We estimate the flux of gamma-rays that result from collisions of high energy galactic cosmic rays with the solar atmosphere. An important aspect of our model is the propagation of cosmic rays through the magnetic fields of the inner solar systems. We use diffusion to model propagation down to the bottom of the corona. Below the corona we trace particle orbits through the photospheric fields to determine the location of cosmic ray interactions in the solar atmosphere and evolve the resultant cascades. For our nominal choice of parameters, we predict an integrated flux of gamma rays (at 1 AU) of F(Egamma greater than 100 MeV) approximately = 5 x 10-8/sq cm sec. This can be an order of magnitude above the galactic background and should be observable by the Energetic Gamma Ray experiment telescope (EGRET).

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