Gamma-ray sources as relies of recent supernovae in the nearby Gould Belt

Authors
Citation
Ia. Grenier, Gamma-ray sources as relies of recent supernovae in the nearby Gould Belt, ASTRON ASTR, 364(2), 2000, pp. L93-L96
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
0004-6361 → ACNP
Volume
364
Issue
2
Year of publication
2000
Pages
L93 - L96
Database
ISI
SICI code
0004-6361(200012)364:2<L93:GSAROR>2.0.ZU;2-O
Abstract
The nearby, 30 to 40 Myr old, starburst region of the Gould Belt has formed numerous massive stars. Within its similar to 300 pc radius, it produces c ore-collapse supernovae at an enhanced rate which is shown to be 75 to 95 M yr(-1) kpc(-2), i.e. 3 to 5 times higher than the local Galactic rate, over the past and future few million years. A population of persistent, but uni dentified, gamma -ray sources has been recently singled out at medium latit udes above 100 MeV. Their distribution across the sky is shown to be quite significantly and better correlated with the tilted Gould Belt than with ot her Galactic structures. As many as 40 +/- 5 sources are statistically asso ciated with the Belt at /b/ > 5 degrees. It is therefore proposed that thes e sources are part of the Belt and are relies of the Belt supernovae in the form of million-year old pulsars. Their presence stresses how active the l ocal medium is, heated, enriched and shaped by multiple recent explosions.