Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-18
Astronomy and Astrophysics
Astrophysics
10 pages, 6 figures, Invited paper at IAU Symposium No.230, 2005, in Dublin (Ireland); E.J.A. Meurs, G. Fabbiano, eds.; in pre
Scientific paper
10.1017/S174392130600799X
High energy gamma-ray astronomy has recently made significant progresss through ground-based instruments like the {\it H.E.S.S.} array of imaging atmospheric Cherenkov telescopes. The unprecedented angular resolution and the large field of view has allowed to spatially resolve for the first time the morphology of gamma-ray sources in the TeV energy range. The experimental technique is described and the types of sources detected and still expected are discussed. Selected results include objects as different as a Galactic binary Pulsar, the Galactic Center and Supernova Remnants but they also concern the diffuse extragalactic optical/infrared radiation field. Finally, a scan of the Galactic plane in TeV gamma rays is described which has led to a significant number of new TeV sources, many of which are still unidentified in other wavelengths. The field has a close connection with X-ray astronomy which allows the study of the synchrotron emission from these very high energy sources.
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