Discovery of a new population of high-energy γ-ray sources in the Milky Way

Details Discovery of a new population of high-energy γ-ray sources in the Milky Way Discovery of a new population of high-energy γ-ray sources in the Milky Way

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000natur.404..363g&link_type=abstract

Nature, Volume 404, Issue 6776, pp. 363-365 (2000).

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108

Scientific paper

One of the great mysteries of the high-energy γ-ray sky is the group of ~170 unidentified point sources found along the Galactic plane. They are more numerous than all other high-energy γ-ray sources combined and, despite 20 years of effort, no clear counterparts have been found at other wavelengths. Here we report a new population of such objects. A cluster of ~20 faint sources appears north of the Galactic Centre, which is part of a broader class of faint objects at mid-latitudes. In addition, we show in a model-independent way that the mid-latitude sources are distinct from the population of bright unidentified sources along the Galactic plane. The distribution on the sky indicates that the faint mid-latitude sources are associated with the Gould belt of massive stars and gas clouds at ~600 light years distance, as has been previously suggested.

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