Mathematics – Probability
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..510..509r&link_type=abstract
THE FIFTH COMPTON SYMPOSIUM. AIP Conference Proceedings, Volume 510, pp. 509-512 (2000).
Mathematics
Probability
3
Gamma-Ray Sources, Gamma-Ray Bursts, Stellar Content And Populations, Morphology And Overall Structure, Supernova Remnants, Associations Of Stars In The Milky Way
Scientific paper
We present the results of a study on the possible association of unidentified gamma-ray sources in the 3EG Catalog with different types of galactic objects: Wolf-Rayet (WR) and Of stars, supernova remnants (SNRs), and OB star associations (considered as pulsar tracers). We have made simulations of large numbers of galactic populations of gamma-ray sources in order to weight the statistical significance of the positional coincidences. We have found that 6 EGRET detections are coincident with WR stars, 4 with Of stars, 22 with SNRs, and 26 with OB associations. The probability that all the SNR and OB coincidences were the pure effect of chance is negligible (<10-5 and <10-3, respectively). The statistical support for the association of massive stars with EGRET sources is not compelling (probabilities ~10-2-10-3). However, we find that there are a posteriori arguments to support at least three candidates for gamma-ray production in star systems with strong stellar winds: WR 140, 142, and Cyg OB2 No. 5. .
Benaglia Paula
Romero Gustavo E.
Torres Diego F.
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