Quasi-Periodicities in the Anomalous Emission Events in Pulsars B1859+07 and B0919+06

Abstract

A quasi-periodicity has been identified in the strange emission shifts in pulsar B1859+07 and possibly B0919+06. These events, first investigated by Rankin, Rodriguez & Wright in 2006, originally appeared disordered or random, but further mapping as well as Fourier analysis has revealed that they occur on a fairly regular basis of approximately 150 rotation periods in B1859+07 and perhaps some 700 in B0919+06. The events-which we now refer to as "swooshes"-are not the result of any known type of mode-changing, but rather we find that they are a uniquely different effect, produced by some mechanism other than any known pulse-modulation phenomenon. Given that we have yet to find another explanation for the swooshes, we have appealed to a last resort for periodicities in astrophysics: orbital dynamics in a binary system. Such putative "companions" would then have semi-major axes comparable to the light cylinder radius for both pulsars. However, in order to resist tidal disruption their densities must be at least some 10${}^5$ grams/cm${}^3$-therefore white-dwarf cores or something even denser might be indicated.

7 pages, 4 figures, accepted by MNRAS

References in corpus (4)

• Switched magnetospheric regulation of pulsar spin-down
• Understanding the spin-down rate changes of PSR B0919+06
• The Topology and Polarisation of Subbeams Associated with the `Drifting' Subpulse Emission of Pulsar B0943+10 -- IV. Q-to-B-Mode Recovery Dynamics
• A Quantitative Non-radial Oscillation Model for the Subpulses in PSR B0943+10

Cited by in corpus (14)

• The Thousand-Pulsar-Array programme on MeerKAT I: Science objectives and first results
• Periodic Modulation : Newly emergent emission behaviour in Pulsars
• The Mode Switching in Pulsar J1326$-$6700
• Mode switching and oscillations in PSR B1828-11
• An in-depth investigation of 11 pulsars discovered by FAST
• Arecibo 4.5/1.4/0.33-GHz Polarimetric Single-Pulse Emission Survey
• Rapid Modification of Neutron Star Surface Magnetic Field: A proposed mechanism for explaining Radio Emission State Changes in Pulsars
• Pulsar bi-drifting: implications for polar cap geometry
• Meterwavelength Single-pulse Polarimetric Emission Survey. V. Flux density, component spectral variation and emission states
• Multi-frequency study of the peculiar pulsars PSR B0919+06 and PSR B1859+07
• Science Using Single-Pulse Exploration with Combined Telescopes. I. The mode switching, flaring, and single-pulse morphology of PSR B1822-09
• One of Everything: The Breakthrough Listen Exotica Catalog
• The unusual emission from PSR B1859+07 with FAST
• Timing results of 22 years for PSR J0922+0638