Search for a Dark Matter annihilation signal from the Sagittarius dwarf galaxy with H.E.S.S

H. E. S. S. Collaboration, E. Moulin, C. Farnier, J. -F. Glicenstein, A. Jacholkowska, L. Rolland, M. Vivier

Published 2007-11-23Version 1

Dwarf Spheroidal galaxies are amongst the best targets to search for a Dark Matter annihilation signal. The annihilation of WIMPs in the center of Sagittarius dwarf spheroidal (Sgr dSph) galaxy would produce high energy gamma-rays in the final state. Observations carried out with the H.E.S.S. array of Imaging Atmospheric Cherenkov telescopes are presented. A careful modelling of the Dark Matter halo profile of Sgr dwarf was performed using latest measurements on its structural parameters. Constraints on the velocity-weighted cross section of Dark Matter particles are derived in the framework of Supersymmetric and Kaluza-Klein models.