Seminar Astrophysics Seminar

Recent Results from Radio Pulsar Searches in Globular Clusters

Ryan Lynch

University of Virginia

The Green Bank Telescope has been used to find 68 pulsars in 13 globular clusters, the majority of them being millisecond pulsars. I will report on the latest round of GBT cluster searches. Twenty clusters have been searched, some for the first time, and all more sensitively than ever before, and eight new pulsars have been discovered in M22, M28, NGC 5986, and NGC 6517. Seven of the new pulsars are true MSPs with spin periods < 10 ms, and three of the pulsars are in binary systems. I also report on seven new timing solutions for previously known pulsars in M62, NGC 6544, and NGC 6624. Some highlights include a long-period, mildly eccentric binary and potential new double neutron star system, and many of the new pulsars can be used to place limits on the mass-to-light ratio deep in the cluster cores.