GAMMA-RAY PULSARS IN GOULD BELT AND UNIDENTIFIED GAMMA-RAY SOURCES IN MEDIUM LATITUDES

We study the gamma-ray emission properties of pulsars by using a selfconsistent outer gap model. The outer gap of pulsars with large inclination angle can exist even their age > 106 yr old. We use Monte Carlo techniques to simulate the statistical properties of rotation-powered pulsars in the Gould Belt. If the pulsar birth rate in Gould Belt is 3 × 10-5 yr -1, the gamma-ray pulsars in this region, which can be detected by EGRET, will must be dominated by those pulsars with large inclination angles. We predict that these gamma-ray pulsars should have a wider period P~ (0.5–0.8)s and with a typical age of several million years old.