MWA investigation of pulsar emission characteristics and single-pulse properties

Abstract

Periodic sub-pulse modulation in pulsars, where intensity of sub-pulses modulate periodically, is still an unexplained phenomenon. Its evolution needs to be studied to understand characteristics of periodic pulse modulations and associated features like nulling, drifting, etc., observed in a large sample of pulsars. We explore the pulse and single-pulse observations of the pulsar PSR J1825–0935 obtained using the Murchison Widefield Array (MWA) with a central frequency of 184.96 MHz. Our analysis of these unprecedented high sensitivity observations at these frequencies reveal the low frequency behavior of the single-pulse periodic intensity modulations from PSR J1825–0935 . In future, we plan to examine this behavior at different epochs and correlate with the physical parameters of the pulsar to shed light on its emission mechanism, especially at low frequencies.