Returning Positron Flux in the Polar-Cap Regions of a Radio Pulsar

Details Returning Positron Flux in the Polar-Cap Regions of a Radio Pulsar Returning Positron Flux in the Polar-Cap Regions of a Radio Pulsar

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003arep...47.1046b&link_type=abstract

Astronomy Reports, vol. 47, Issue 12, p.1046-1053

Astronomy and Astrophysics

Astronomy

Scientific paper

An approximate method for calculating the returning positron flux in the polar-cap regions of a radio pulsar is proposed. The pulsar is considered in the Goldreich-Julian model for a regime of free-electron emission from the neutron-star surface in the region of open lines of the dipolar magnetic field. Calculations have been done for the case when the dipolar magnetic moment is aligned with the star's rotational axis. The acceleration of primary electrons is assumed to occur near the neutron-star surface on scales comparable to the transverse radius of the tube of open field lines. The generation of electron-positron pairs by curvature radiation of the primary electrons is taken into account. A considerable contribution to the returning flux is made by the region where the electric field is screened by the electron-positron plasma.

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