Vacuum Gap Model for PSR B0943+10

Details Vacuum Gap Model for PSR B0943+10 Vacuum Gap Model for PSR B0943+10

2002-04-12

arxiv.org/abs/astro-ph/0204210v1

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1051/0004-6361:20020475

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.

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