Galactic Gamma-Ray Halo of the Nearby Starburst Galaxy NGC 253
arXiv:astro-ph/0301147 · doi:10.1086/368405
Abstract
Recently, the CANGAROO-II telescope detected diffuse TeV gamma-ray emission from a nearby edge-on starburst galaxy, NGC 253. The emission mechanism is discussed in this report. We review the emissions of radio-to-TeV gamma-rays from NGC 253, and present a model of the non-thermal emissions due to synchrotron radiations and inverse Compton scatterings. A halo model successfully explains the multiband spectrum of NGC 253.
11 pages, 1 figure. submitted to ApJL