Fermi Gamma-ray Space Telescope

Origin of the TeV Gamma-ray source towards Globular Cluster Ter 5

Wlodek Bednarek
T. Sobczak

Abstract:

Several Globular Clusters (GC) have been recently discovered as GeV gamma-ray sources. This emission is likely produced by a large populations of millisecond pulsars (MSPs). However, MSPs are also believed to inject TeV leptons which can up-scatter background radiation field (produced by stars and other origin) to the TeV gamma-ray range. Up to now, only in the direction of GC Ter 5 TeV gamma-ray source has been discovered by HESS Collaboration. The origin of the source is enigmatic due to its small displacement in respect to the GC core. We discuss the scenario, in which the misalignment of the TeV gamma-ray source is explained as due to the motion of the GC in the interstellar medium.