13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

Disrupted globular clusters explain gamma ray excess in the Galactic center

17 Dec 2015, 16:35
Level -1, Room 17 (International Conference Centre Geneva)

Level -1, Room 17

International Conference Centre Geneva


Prof. Bence Kocsis (Eötvös University)


The Fermi satellite has recently detected gamma ray emission from the central regions of our Galaxy. This may be evidence for dark matter particles, a major component of the standard cosmological model, annihilating to produce high-energy photons. We show that the observed signal may instead be generated by millisecond pulsars that formed in dense star clusters in the Galactic halo. Most of these clusters were ultimately disrupted by evaporation and gravitational tides, contributing to a spherical bulge of stars and stellar remnants.

Primary authors

Prof. Bence Kocsis (Eötvös University) Dr Timothy Brandt (Institute for Advanced Study)

Presentation Materials