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.

arXiv commentAccepted, ApJ Letters. 3 figures, 5 pages

References in corpus (29)

• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• Transient radio bursts from rotating neutron stars
• DSPSR: Digital Signal Processing Software for Pulsar Astronomy
• A periodically active pulsar giving insight into magnetospheric physics
• The Parkes Pulsar Timing Array Project
• Fermi Large Area Telescope Observations of the Crab Pulsar and Nebula
• Evidence for alignment of the rotation and velocity vectors in pulsars
• The glitch-induced identity changes of PSR J1119-6127
• RRATs: New Discoveries, Timing Solutions & Musings
• Profile and polarization characteristics of energetic pulsars
• Limitations in timing precision due to single-pulse shape variability in millisecond pulsars
• Giant Pulses from the Millisecond Pulsar B1821-24
• Is pulsar B0656+14 a very nearby RRAT source?
• Giant Pulses from PSR B0540-69 in the Large Magellanic Cloud
• The High Time Resolution Universe Survey - V: Single-pulse energetics and modulation properties of 315 pulsars
• High time-resolution observations of the Vela pulsar
• High-resolution single-pulse studies of the Vela Pulsar
• Profile morphology and polarization of young pulsars
• Pulsar Timing with the Parkes Radio Telescope for the Fermi Mission
• Simultaneous single-pulse observations of radio pulsars - IV. Flux density spectra of individual pulses
• Green Bank Telescope Studies of Giant Pulses from Millisecond Pulsars
• Intrinsic Variability of the Vela Pulsar: Lognormal Statistics and Theoretical Implications
• A search for giant pulses in Vela-like pulsars
• Constraints on viewing geometries from radio observations of $\gamma$-ray-loud pulsars using a novel method
• Pulse intensity modulation and the timing stability of millisecond pulsars: A case study of PSR J1713+0747
• Timing, polarimetry and physics of the bright, nearby millisecond pulsar PSR J0437-4715 - a single-pulse perspective
• Radio polarization measurements from RRAT J1819-1458
• Intrinsic Variability and Field Statistics for the Vela Pulsar: 2. Systematics and Single-Component Fits
• Analysis of single pulse radio flux measurements of PSR B1133+16 at 4.85 and 8.35 GHz

Cited by in corpus (4)

• Dual-frequency single-pulse study of PSR B0950+08
• Detection of giant pulses in PSR J1047-6709
• The two emission states of PSR B1534+12
• Hyperbolic limit on the early arrival time of bright pulses from PSR~J0835$-$4510 (Vela)