Photon and Particle Production in Cassiopeia A: Predictions From Nonlinear Diffusive Shock Acceleration

Details Photon and Particle Production in Cassiopeia A: Predictions From Nonlinear Diffusive Shock Acceleration Photon and Particle Production in Cassiopeia A: Predictions From Nonlinear Diffusive Shock Acceleration

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999head....4.3505e&link_type=abstract

American Astronomical Society, HEAD meeting #4, #35.05; Bulletin of the American Astronomical Society, Vol. 31, p.738

Astronomy and Astrophysics

Astronomy

Scientific paper

We calculate ion and electron spectra for Cas A using a nonlinear model of diffusive shock acceleration. With these spectra, we calculate continuum photon emission from radio to gamma-ray energies and compare our results to observations. The observational constraints, particularly the ratio of radio intensity to gamma-ray upper limits, imply that electrons are emitting in an extremely strong magnetic field (of order 1000 mu G), in accord with previous suggestions. If fields of this strength exist, our models show that cosmic rays with energies >10(15) eV can be obtained in this young remnant. Future X- and gamma-ray measurements should strongly constrain models.

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