2005/01/13 by W. Wang, Z. J. Jiang, K. S. Cheng · 3 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Egret #Galactic Center #Galactic plane #Galaxy #Gamma ray #Gamma-ray bursts and supernovae #Millisecond pulsar #Nuclear physics #Physics #Population #Pulsar #Pulsars and Gravitational Waves Research #Synchrotron radiation #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2005.08816.x
published as Mon.Not.Roy.Astron.Soc. 358 (2005) 263-269 · 8 pages, 4 figures, accepted by MNRAS
arxiv created 2005/01/13 · openalex publication_date 2005/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Diffuse gamma-rays in the Galactic Centre region have been studied. We propose that there exists a population of millisecond pulsars in the Galactic Centre, which emit GeV gamma-rays through synchrotron-curvature radiation as predicted by outer gap models. These GeV gamma-rays from unresolved millisecond pulsars probably contribute to the diffuse gamma-ray spectrum detected by EGRET which displays a break at a few GeV. We have used a Monte Carlo method to obtain simulated samples of millisecond pulsars in the Galactic Centre region covered by EGRET according to the different period and magnetic field distributions from observed millisecond pulsars in the Galactic field and globular clusters, and superposed their synchrotron-curvature spectra to derive the total GeV flux. Our simulated results suggest that there probably exist about 6000 unresolved millisecond pulsars in the region of angular resolution of EGRET, the emissions of which could contribute significantly to the observed diffuse gamma-rays in the Galactic Centre.