Speaker
Description
The phenomenon of pulsar nulling, where pulsars temporarily and stochastically cease their radio emission, is thought to be indicative of a dying' pulsar, where radio emission ceases entirely. Here we report the discovery of a long-period pulsar, PSR J0452-3418, from the ongoing Southern-sky MWA Rapid Two-meter (SMART) pulsar survey.
The pulsar exhibits both sub-pulse drifting and quasi-periodic nulling, the latter of which is uncommon, only reported in $<1$\% of the pulsar population, with even a smaller fraction showing periodic nulling and sub-pulse drifting. Our analysis shows a majority of this population has long periods and sits in thedeath valley’, implying a connection between quasi-periodic nulling and the pulsar death mechanism. To expand this population further, we simulated long-period and nulling signals and tested the efficacy of three different search algorithms, which would aid in future detections. We intend to conduct a population census on the nulling population of pulsars using MWA data. This investigation will facilitate the discernment of the prevalence of quasi-periodic nulling and the identification of any trends that could aid in the understanding of nulling and the pulsar death mechanism.
| Timeslot preferences | 10min |
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