Electron-positron pairs production in the pulsar magnetosphere

Astronomy and Astrophysics – Astronomy

Scientific paper

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Electron-Positron Pairs, Magnetospheric Electron Density, Pair Production, Pulsar Magnetospheres, Pulsars, Space Plasmas, Stellar Atmospheres, Electron Plasma, Electron-Positron Plasmas, Gamma Ray Astronomy, Plasma Oscillations, Polar Caps, Stellar Magnetic Fields, Stellar Mass, Stellar Models

Scientific paper

The case of an aligned rotator magnetosphere is treated. It is noted that in the absence of ion ejection from the neutron stellar surface the pulsar magnetosphere consists of two polar electron caps, the upper parts of which are unstable. Electrons precipitating from these parts fall onto the star and are accelerated to a Lorentz factor between 10 to the 6th and 10 to the 7th. Gamma quanta are radiated by the electrons in the direction of the star and are converted into electron-positron pairs. Electron-positron plasma appears to fill the region (approximately 10 stellar radii) around the star. The influx of electron-positron plasma interacts with the electron gas of the polar cap. Longitudinal plasma vibrations therefore arise, and bunched outflows of electron-positron plasma appear.

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