Subpulse Drifting, Nulling and Mode changing in PSR J18222256
arXiv:1802.00315 · doi:10.1093/mnras/sty297
Abstract
We report a detailed observational study of the single pulses from the pulsar J18222256. The pulsar shows the presence of subpulse drifting, nulling as well as multiple emission modes. During these observations the pulsar existed primarily in two modes; mode A with prominent drift bands and mode B which was more disorderly without any clear subpulse drifting. A third mode C was also seen for a short duration with a different drifting periodicity compared to mode A. The nulls were present throughout the observations but were more frequent during the disorderly B mode. The nulling also exhibited periodicity with a clear peak in the fluctuation spectra. Before the transition from mode A to nulling the pulsar switched to a third drifting state with periodicity different from both mode A and C. The diversity seen in the single pulse behaviour of the pulsar J18222256 provides an unique window into the emission physics.
11 pages, 10 figures, accepted for publication in MNRAS
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