Vacuum Gap Model for PSR B0943+10

Abstract

PSR B0943+10 is known to show remarkably stable drifting subpulses, which can be interpreted in terms of a circumferential motion of 20 sparks, each completing one circulation around the periphery of the polar cap in 37 pulsar periods. We use this observational constraint and argue that the vacuum gap model can adequately describe the observed drift patterns. Further we demonstrate that {\em only} the presence of strong non-dipolar surface magnetic field can favor such vacuum gap formation. Subsequently, for the first time we are able to constrain the parameters of the surface magnetic field, and model the expected magnetic structure on the polar cap of PSR B0943+10 considering the inverse Compton scattering photon dominated vacuum gap.

6 pages, 3 figures, acccepted for publication in Astronomy and Astrophysics

References in corpus (3)

• Modelling of surface magnetic field in neutron stars: application to radio pulsars
• Simultaneous single-pulse observations of radio pulsars: I. The polarization characteristics of PSR B0329+54
• Topology and Polarisation of Subbeams Associated With Pulsar B0943+10's `Drifting'-Subpulse Emission: II. Analysis of Gauribidanur 35-MHz Observations

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