Unidentified 3EG gamma-ray sources at low galactic latitudes

Citation
Ge. Romero et al., Unidentified 3EG gamma-ray sources at low galactic latitudes, ASTRON ASTR, 348(3), 1999, pp. 868-876
Citations number
59
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
0004-6361 → ACNP
Volume
348
Issue
3
Year of publication
1999
Pages
868 - 876
Database
ISI
SICI code
0004-6361(199908)348:3<868:U3GSAL>2.0.ZU;2-7
Abstract
We present a study on the possible association of unidentified gamma-ray so urces in the Third EGRET (3EG) calalog with different types of galactic obj ects such as Wolf-Rayet and Of stars, supernova remnants (SNRs), and OB ass ociations (considered as pulsar tracers). We have made use of numerical sim ulations of galactic populations of gamma-ray point sources in order to det ermine the statistical significance of the positional coincidences. New con straints on pure chance association are presented for SNRs and OB associati ons. There is ovenvhelming statistical support for the hypothesis that some SNRs are gamma-ray sources (we obtain probabilities of pure chance associa tion < 10(-5)). OB star associations present higher, but still negligible p robabilities (< 10(-3)). It is also shown that although massive stars prese nt just marginally significant correlation with 3EG sources, there is a pos teriori support for at least three candidates.