Diffuse hard X-ray and gamma-ray emission from M87

Details Diffuse hard X-ray and gamma-ray emission from M87 Diffuse hard X-ray and gamma-ray emission from M87

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..687d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 15, 1988, p. 687-692.

Astronomy and Astrophysics

Astrophysics

15

Electron Distribution, Elliptical Galaxies, Gamma Ray Spectra, Interstellar Magnetic Fields, Relativistic Particles, X Ray Spectra, Galactic Mass, Galactic Nuclei, Virgo Galactic Cluster

Scientific paper

Radio measurements are used to infer the relativistic electron distributions in the central and halo regions of M87. From these distributions and the inferred relativistic proton components, the hard X-ray and gamma-ray spectrum of M87, is predicted, taking into account all relevant radiative processes. The feasibility of measuring the high-energy spectrum of M87 with the High Energy Gamma-Ray Telescope (Egret) on board the Gamma Ray Observatory (GRO) is discussed. Comparison of our calculation with present gamma-ray flux upper limits leads to a lower limit of 1.5 micro-G on the mean value of the halo magnetic field.

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