On the Beaming Statistics of Gamma-Ray Sources

Details On the Beaming Statistics of Gamma-Ray Sources On the Beaming Statistics of Gamma-Ray Sources

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...446l..63d&link_type=abstract

Astrophysical Journal Letters v.446, p.L63

Astronomy and Astrophysics

Astronomy

145

Galaxies: Active, Gamma Rays: Bursts, Gamma Rays: Theory, Radiation Mechanisms: Nonthermal

Scientific paper

The beaming pattern produced by a relativistically moving blob of isotropic nonthermal electrons that Thomson-scatter photons from an external isotropic radiation field goes as D4+2α. Here D is the Doppler factor, and α is the energy spectral index of the radiation. This differs from the well-known beaming pattern produced by radiation emitted isotropically in the blob frame, which is ∝ D3+α. This result is important for treatments of blazar statistics, beaming constraints, and tests of gamma-ray source models.

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