On the surface extraction of electrons in a pulsar

Details On the surface extraction of electrons in a pulsar On the surface extraction of electrons in a pulsar

2009-09-19

arxiv.org/abs/0909.3581v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

8 pages, 1 figure, accepted for publication in MNRAS

Scientific paper

We present a novel description of how energetic electrons may be ejected from the pulsar interior into the atmosphere, based on the collective electrostatic oscillations of interior electrons confined to move parallel to the magnetic field. The size of the interior magnetic field influences the interior plasma frequency, via the associated matter density compression. The plasma oscillations occur close to the regions of maximum magnetic field curvature, that is, close to the magnetic poles where the majority of magnetic flux emerges. Given that these oscillations have a density-dependent maximum amplitude before wave-breaking occurs, such waves can eject energetic electrons using only the self-field of the electron population in the interior. Moreover, photons emitted by electrons in the bulk of the oscillation can escape along the field lines by virtue of the lower opacity there (and the fact that they are emitted predominantly in this direction), leading to features in the spectra of pulsars.

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