The pulsar contribution to gamma-rays from the Galactic disc

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gamma Rays, Pulsars, Radiant Flux Density, Radio Sources (Astronomy), Stellar Radiation, Diffuse Radiation, Disks (Shapes), Galactic Radiation, Galactic Structure, Spatial Distribution, Stellar Luminosity

Scientific paper

The properties of pulsars at radio frequencies are used as a basis for estimates of the contribution from pulsars to the diffuse gamma-ray flux from the Galactic plane. By taking account both of fluxes from the known gamma-ray pulsars and the upper limits for many others, we find the best estimate of the fraction of the Galactic flux coming from pulsars to be 5-10 per cent. A recent suggestion of a much larger contribution is shown to be very improbable. Some possibly significant correlations between bright pulsars and observed gamma-ray peaks are pointed out.

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