Galactic Gamma-Ray Halo of the Nearby Starburst Galaxy NGC 253

Details Galactic Gamma-Ray Halo of the Nearby Starburst Galaxy NGC 253 Galactic Gamma-Ray Halo of the Nearby Starburst Galaxy NGC 253

2003-01-09

arxiv.org/abs/astro-ph/0301147v1

Astrophys.J. 584 (2003) L65-L68

Astronomy and Astrophysics

Astrophysics

11 pages, 1 figure. submitted to ApJL

Scientific paper

10.1086/368405

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.

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