Timing and Searching for Pulsars in 47 Tucanae

Details Timing and Searching for Pulsars in 47 Tucanae Timing and Searching for Pulsars in 47 Tucanae

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atnf.prop.1320f&link_type=abstract

ATNF proposal P282, Semester: April, 2008

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Stellar, Parkes

Scientific paper

From 1989 to 2005, we have discovered a total of 23 millisecond pulsars in 47 Tucanae and obtained coherent timing solutions for 19 of those. This dataset has already allowed studies of stellar evolution and cluster dynamics and the first detection of the interstellar medium in a globular cluster. The remaining scientific objectives of this project can now be accomplished with less intensive, long-term timing: we want to keep track of the rotational phase of these pulsars and increase the number and precision of measured proper motions. The full analysis of all the previous data is still ongoing: we have recently found a new pulsar (47TucZ), confirmed and determined the orbit of a previously know object (47TucX), and determined the timing solutions of three others (the binary pulsar with the shortest orbital period, 47TucR, another eclipsing binary pulsar, 47TucW, and a newly dicovered binary, 47TucY). This has allowed the identification of these three pulsars in X-rays using Chandra and the identification of the companion of 47TucY in optical HST data.

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