Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 94: Gammaastronomie III
T 94.1: Vortrag
Mittwoch, 17. März 2010, 14:00–14:15, HG VII
Non-thermal particle acceleration in the Globular Cluster Terzan 5? — •Peter Eger1, Wilfried Domainko2, and Andre-Claude Clapson2 — 1ECAP, Universität Erlangen-Nürnberg — 2Max-Planck-Institut für Kernphysik, Heidelberg
Terzan 5 is the galactic Globular Cluster hosting the largest population of known millisecond pulsars, which are a potential source of high-energy electrons due to acceleration processes in their magnetospheres. These electrons can produce very-high-energy gamma-rays via Inverse-Compton up-scattering of low-energy photons, accompanied by synchrotron emission in X-rays.
Using the data of an archival Chandra observation, pointed towards Terzan 5, we detect significant extended X-ray emission, which decreases smoothly in surface brightness with increasing distance from the cluster core. This result makes Terzan 5 a promising target for observations with ground-based gamma-ray telescopes to test the synchrotron scenario.