1994/12/07 by I. -A. Yadigaroglu, I. A. Yadigaroglu, Roger W. Romani · 3 citations
Earth and Planetary Sciences · Physics and Astronomy · #Gamma-ray bursts and supernovae #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.1086/176047
6 pages, all in postscript, with figures Animation of pulsar model at http://geminga.stanford.edu/users/ion/home.html
arxiv created 1994/12/07 · openalex publication_date 1995/08/01 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We compute the variation of the beaming fraction with the efficiency of high-energy γ-ray production in the outer gap pulsar model of Romani and Yadigaroglu. This allows us to correct the fluxes observed for pulsars in the EGRET band and to derive a simple estimate of the variation of efficiency with age. Integration of this model over the population of young neutron stars gives the expected number of γ-ray pulsars along with their distributions in age and distance. This model also shows that many of the unidentified EGRET plane sources should be pulsars and predicts the γ-ray fluxes of known radio pulsars. The contribution of unresolved pulsars to the background flux in the EGRET band is found to be ∼5%.