GBT Observations of Radio Pulsars in Clusters

Details GBT Observations of Radio Pulsars in Clusters GBT Observations of Radio Pulsars in Clusters

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...6e..32r&link_type=abstract

Neutron Stars and Black Holes in Star Clusters, 26th meeting of the IAU, Joint Discussion 6, 17-18 August 2006, Prague, Czech Re

Astronomy and Astrophysics

Astrophysics

Scientific paper

In the past 5 years, the Green Bank Telescope (GBT) has discovered almost 60 new radio pulsars in globular clusters, effectively doubling the number known. The vast majority of these new systems are millisecond pulsars and about half of them are members of binaries. The most surprising result is that the rich bulge cluster Terzan 5 now contains 33 known millisecond pulsars - by far the most of any globular cluster. Timing observations of most of the new pulsars are underway, and a wide variety of science is starting to result. Many of the pulsars are truly unique and/or exotic objects that could only have been produced in dense cluster cores after stellar interactions. Some of the stranger systems include the fastest known spinning neutron star (PSR J1748-2446ad at 716 Hz), 9 highly eccentric binary systems, at least 5 eclipsing systems, and 2 millisecond pulsars which seemingly have main-sequence-like stellar companions. Several of these pulsars constrain the equation of state of matter at supra-nuclear densities, while others will eventually provide masses of spun-up neutron stars and interesting tests of gravitational theories. In addition, the pulsars will allow us to probe a wide variety of other astrophysics such as eclipse mechanisms, cluster dynamics, and the structure of the interstellar medium.

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