'Notches' in the Profiles of Bright Pulsars

Abstract

We discuss the discovery of `notch-like' features in the mean pulse profile of the nearby, bright pulsar B0950+08. We compare these low-level features with those previously seen in the pulse profiles of pulsars J0437-4715 and B1929+10. While J0437-4715 is a binary millisecond pulsar and B0950+08 and B1929+10 are isolated, slow pulsars, all three pulsars are nearby and very bright. Furthermore, all three have detectable emission over an unusually wide range of pulse phase. We describe the similar properties of the notch features seen in all three pulsars and discuss possible interpretations.

arXiv comment5 pages, 9 figures, submitted to MNRAS. See also astro-ph/0311467

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• VLBA Measurement of Nine Pulsar Parallaxes
• Ultraviolet Emission from the Millisecond Pulsar J0437-4715
• X-ray Radiation from the Millisecond Pulsar J0437-4715
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• Pulsar microstructure and its quasi-periodicities with the S2 VLBI system at a resolution of 62.5 nanoseconds
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• HST Proper Motion confirms the optical identification of the nearby pulsar PSR 1929+10
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Cited by in corpus (17)

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• TMRT observations of 26 pulsars at 8.6 GHz
• Asymmetry of bifurcated features in radio pulsar profiles
• Utilizing cosmic-ray positron and electron observations to probe the averaged properties of Milky Way pulsars
• A model for double notches and bifurcated components in radio profiles of pulsars and magnetars - Evidence for the parallel acceleration maser in pulsar magnetosphere
• The radio signal of PSR B0950+08 is detected over the whole pulse phase
• Highly polarized components of integrated pulse profiles
• The ratio of profile peak separations as a probe of pulsar radio-beam structure
• A model for distortions of polarisation-angle curves in radio pulsars
• The geometry of a radio pulsar beam
• Radio emission across the entire rotation phases of pulsars
• Evidence for scattering of curvature radiation in radio pulsar profiles
• Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons
• Antenna source of radio-frequency emission in ion-proton pulsars