Observations of six glitches in PSR B1737−30 |
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| Authors: | W Z Zou N Wang R N Manchester J O Urama G Hobbs Z Y Liu J P Yuan |
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| Institution: | Urumqi Observatory, NAO-CAS, 40-5 South Beijing Road, Urumqi 830011, China;Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 1710, Australia;Department of Physics and Astronomy, University of Nigeria, Nsukka;Graduate School of CAS, 19 Yuquan Road, Beijing 100039, China |
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| Abstract: | Six glitches have been recently observed in the rotational frequency of the young pulsar PSR B1737?30 (J1740?3015) using the 25-m Nanshan telescope of Urumqi Observatory. With a total of 20 glitches in 20 yr, it is one of the most frequently glitching pulsars of the ～1750 known pulsars. Glitch amplitudes are very variable with fractional increases in rotation rate ranging from 10?9 to 10?6. Interglitch intervals are also very variable, but no relationship is observed between interval and the size of the preceding glitch. There is a persistent increase in  , opposite in sign to that expected from slowdown with a positive braking index, which may result from changes in the effective magnetic dipole moment of the star during the glitch. |
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| Keywords: | stars: neutron pulsars: individual: PSR B1737?30 |
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