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• W2028931008 abstract "We have used a new observing system on the Parkes radio telescope to carry out a series of pulsar observations of the globular cluster 47 Tucanae at 20 cm wavelength. We detected all 11 previously known pulsars and have discovered nine others, all of which are millisecond pulsars in binary systems. We have searched the data for relatively short orbital period systems, and found one pulsar with an orbital period of 96 minutes, the shortest of any known radio pulsar. The increased rate of detections with the new system resulted in improved estimates of the flux density of the previously known pulsars, determination of the orbital parameters of one of them, and a coherent timing solution for another one. Five of the pulsars now known in 47 Tucanae have orbital periods of a few hours and implied companion masses of only ~0.03 M☉. Two of these are eclipsed at some orbital phases, while three are seen at all phases at 20 cm but not always at lower frequencies. Four and possibly six of the other binary systems have longer orbital periods and companion masses ~0.2 M☉, with at least two of them having relatively large orbital eccentricities. All 20 pulsars have rotation periods in the range 2-8 ms." @default.
• W2028931008 created "2016-06-24" @default.
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• W2028931008 date "2000-06-01" @default.
• W2028931008 modified "2023-10-09" @default.
• W2028931008 title "Observations of 20 Millisecond Pulsars in 47 Tucanae at 20 Centimeters" @default.
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• W2028931008 doi "https://doi.org/10.1086/308859" @default.
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