Pulsar Glitch Recovery – Theory and Observation

Abstract

Two pulsars PSRs B1046-58 and B1737-30 whose timing characteristics are comparable to the vela pulsar, were monitored for glitches using the 26-m radio telescope of the hartbeesthoek radio astronomy observatories (hartRAO),south africa. this was an attempt at extending th hartRAO glitch-detection project,which has been quite successful in near real time detection of recent vela pulsar glitches. had previously been detected in PSR 1046-58 by cotrast, PSR 1737-37 is the most frequently glitching pulsar known but its post-glitch behavior has been observed as well as that of the vela pulsar for the first time a glitch was observed in PSR 1046-58. A very large glitch was observed on PSR 1737-30. and this is the largest glitch to be observed on this pulsar so far. An exponential recovery of 0.70 0.05 was found for PSR 1046-58. with a time scale of 113 8 days. the quantity of our data was not sufficient to model any possible recovery of less than twenty days.PSR 1046-58 shows a slow recovery of its spin-down rate of the pre-glitch. In addition the hartRAO timing data for 26 pulsars over the past 14 years are searched for glitches.six small glitches (of fractional change in ration rate )and one large glitch were found.the parameters for these glitches have been given. a few of the pulsars show an unusual behavior in the evolution of thier frequency-derivative possible interpretation of such behavior are given.