On the nature of the unidentified EGRET sources: Are they Geminga-like pulsars?

Details On the nature of the unidentified EGRET sources: Are they Geminga-like pulsars? On the nature of the unidentified EGRET sources: Are they Geminga-like pulsars?

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...441l..61m&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 441, no. 2, p. L61-L64

Astronomy and Astrophysics

Astronomy

33

Gamma Ray Astronomy, Gamma Rays, Milky Way Galaxy, Point Sources, Pulsars, Spatial Distribution, Astrometry, Distance, Gamma Ray Observatory, Stellar Luminosity

Scientific paper

Observations with the Energetic Gamma Ray Experiment Telescope (EGRET) aboard the Compton Gamma Ray Observatory (CGRO) show more than 30 unidentified gamma-ray sources concentrated along the Galactic plane. Based on their spatial distribution, the typical distances of the sources are found to be between 1.2 and 6 kpc. Luminosity estimates made using the estimated distances of the sources and their observed gamma-ray fluxes lie in the range (0.7-16.7) x 1035 ergs/s. These values, on the average, appear to be higher than the luminosities of the gamma-ray pulsars observed by EGRET. The luminosity estimates indicate that the low-latitude unidentified EGRET sources cannot be explained as a group of older, low-luminosity pulsars like Geminga, although the high-latitude sources may be candidates.

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