Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 94: Gammaastronomie III

T 94.7: Talk

Wednesday, March 17, 2010, 15:30–15:45, HG VII

New unidentified H.E.S.S. Galactic sources. — •Omar Tibolla¹, Okkie de Jager², Wilfried Domainko¹, Sarah Kaufmann³, Nukri Komin⁴, Karl Kosack⁵, and Werner Hofmann¹ — ¹Max-Planck-Institut für Kernphysik, Heidelberg, P.O. Box 103980, D69029 Heidelberg, Germany — ²Unit for Space Physics, North-West University, Potchefstroom 2520, South Africa — ³Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany — ⁴CEA, Irfu, SPP, Centre de Saclay, F-91191 Gif-sur-Yvette, France — ⁵CEA, Irfu, SAP, Centre de Saclay, F-91191 Gif-sur-Yvette, France

H.E.S.S. is one of the most sensitive instruments in the very high energy (VHE; > 100 GeV) gamma-ray domain and has revealed many new sources along the Galactic Plane. After the successful first VHE Galactic Plane Survey of 2004, H.E.S.S. has continued and extended that survey in 2005-2008, discovering a number of new sources, many of them are unidentified. While some of the unidentified H.E.S.S. sources have several positional counterparts and hence several different possible scenarios for the origin of the VHE gamma-ray emission, their identification remains unclear. Others have so far no counterparts at any other wavelength. Particularly, the lack of an X-ray counterpart puts serious constraints on emission models. Several newly discovered sources will be discussed here.