Two radio-emission mechanisms in PSR J0901-4624

Abstract

We have detected sporadic, bright, short-duration radio pulses from PSR J0901$-$4624. These pulses are emitted simultaneously with persistent, periodic emission that dominates the flux density when averaging over many periods of the pulsar. The bright pulses have energies that are consistent with a power-law distribution. The integrated profile of PSR J0901$-$4624 is highly polarized and shows four distinct components. The bright pulses appear to originate near the magnetic pole of the pulsar and have polarization properties unlike that of the underlying emission at the same pulse phase. We conclude that the bright pulses represent a secondary giant-micropulse emission process, possibly from a different region in the pulsar magnetosphere.

Accepted, ApJ Letters. 3 figures, 5 pages

References in corpus (10)

• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• A periodically active pulsar giving insight into magnetospheric physics
• Profile and polarization characteristics of energetic pulsars
• Limitations in timing precision due to single-pulse shape variability in millisecond pulsars
• Is pulsar B0656+14 a very nearby RRAT source?
• Profile morphology and polarization of young pulsars
• Constraints on viewing geometries from radio observations of $\gamma$-ray-loud pulsars using a novel method
• Timing, polarimetry and physics of the bright, nearby millisecond pulsar PSR J0437-4715 - a single-pulse perspective
• Radio polarization measurements from RRAT J1819-1458
• Analysis of single pulse radio flux measurements of PSR B1133+16 at 4.85 and 8.35 GHz