Mathematics – Probability
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21721503l&link_type=abstract
American Astronomical Society, AAS Meeting #217, #215.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Probability
Scientific paper
The Green Bank Telescope has been used to find 68 pulsars in 13 globular clusters, the majority of them being millisecond pulsars. I 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. Many of the new pulsars can be used to place limits on the mass-to-light ratio deep in the cluster cores. Motivated by an isolated MSP in NGC 6517 that lies nearly 20 core radii from the cluster center, I have developed a new probability analysis for globular cluster pulsar positions, which I apply to those pulsars with well measured positions. Finally, I present a study of the population of non-recycled pulsars originating in globular clusters.
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