Freiburg 2008 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 14: Astrophysics II

EP 14.2: Hauptvortrag

Donnerstag, 6. März 2008, 12:15–12:45, KGI-Aula

H.E.S.S. Unidentified VHE Gamma-ray Sources — •Karl Kosack for the H.E.S.S. collaboration — Max-Planck-Institut fuer Kernphysik, Heidelberg

Scan-based observations of the Galactic plane and continuing re-observations of known very-high-energy (VHE) gamma-ray sources with the H.E.S.S. system of imaging atmospheric Cherenkov telescopes have revealed a wide variety of new VHE objects. While in many cases these objects can be associated with known sources in the X-ray and radio wavebands, a subset of them currently have so far no cataloged lower-energy counterpart. Since at least weak X-ray and radio emission is predicted by most common VHE emission models, the lack of lower-energy detections may provide substantial model constraints and may even point to a new class of objects which emit primarily in the VHE energy range. An analysis of 8 recently detected extended, unidentified VHE gamma-ray sources will be presented.