Speaker
Description
The globular cluster Omega Centauri is the most massive and luminous cluster in the Galaxy. The gamma-ray source FL8Y 1326.7-4729 is coincident with the core of the cluster, leading to speculation that hitherto unknown radio pulsars or annihilating dark matter may be present in the cluster core. We discovered five millisecond pulsars (MSPs) in Omega Centauri and have been monitoring these pulsars with the Parkes telescope. We show that all five pulsars are located within the core region of the cluster and four of them are associated with X-ray sources. While no gamma-ray pulsation has been detected, their association with X-ray sources strongly suggests that MSPs in the core of Omega Centauri contribute a significant fraction of the detected gamma-ray emission.
