Indirect dark matter searches with H.E.S.S

TL;DR

This paper discusses the use of H.E.S.S. telescopes to search for gamma-ray signals from dark matter annihilation in dwarf galaxies, presenting observations of Sagittarius dwarf and constraining dark matter models.

Contribution

It reports new H.E.S.S. observations of the Sagittarius dwarf galaxy and derives constraints on dark matter particle properties within supersymmetric and Kaluza-Klein frameworks.

Findings

Constraints on dark matter annihilation cross section established.

Modeling of Sagittarius dwarf galaxy's dark matter halo profile.

Future prospects for dark matter searches with H.E.S.S. discussed.

Abstract

The annihilations of WIMPs produce high energy gamma-rays in the final state. These high energy gamma-rays may be detected by IACTs such as the H.E.S.S. array of Imaging Atmospheric Cherenkov telescopes. Besides the popular targets such as the Galactic Center or galaxy clusters such as VIRGO, dwarf spheroidal galaxies are privileged targets for Dark Matter annihilation signal searches. H.E.S.S. observations on the Sagittarius dwarf galaxy are presented. The modelling of the Dark Matter halo profile of Sagittarius dwarf is discussed. Constraints on the velocity-weighted cross section of Dark Matter particles are derived in the framework of Supersymmetric and Kaluza-Klein models. The future of H.E.S.S. will be briefly discussed.