<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Mastichiadis, Apostolos</style></author><author><style face="normal" font="default" size="100%">Brecher, Kenneth</style></author><author><style face="normal" font="default" size="100%">Marscher, Alan P.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Electromagnetic Cascades in the Magnetosphere of a Very Young Pulsar: A Model for the Positron Production near the Galactic Center</style></title><short-title><style face="normal" font="default" size="100%">The Astrophysical Journal</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Annihilation Reactions</style></keyword><keyword><style  face="normal" font="default" size="100%">Astrophysics</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron Photon Cascades</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron-Positron Pairs</style></keyword><keyword><style  face="normal" font="default" size="100%">ELEMENTARY PARTICLES</style></keyword><keyword><style  face="normal" font="default" size="100%">Galactic Nuclei</style></keyword><keyword><style  face="normal" font="default" size="100%">galaxies: nuclei</style></keyword><keyword><style  face="normal" font="default" size="100%">gamma rays: general</style></keyword><keyword><style  face="normal" font="default" size="100%">Milky Way Galaxy</style></keyword><keyword><style  face="normal" font="default" size="100%">Pair Production</style></keyword><keyword><style  face="normal" font="default" size="100%">Positrons</style></keyword><keyword><style  face="normal" font="default" size="100%">Pulsar Magnetospheres</style></keyword><keyword><style  face="normal" font="default" size="100%">Pulsars</style></keyword><keyword><style  face="normal" font="default" size="100%">RADIATION MECHANISMS</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1987</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1987/03/1</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://ui.adsabs.harvard.edu/abs/1987ApJ...314...88M</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">314</style></volume><pages><style face="normal" font="default" size="100%">88</style></pages><isbn><style face="normal" font="default" size="100%">0004-637X</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A detailed model for positron production by a young pulsar is presented. It is shown that electromagnetic cascades can develop in a young pulsar's magnetosphere, and the model results are applied to the pulsar which is hypothesized to lie near the Galactic center. It is found that such a pulsar would be expected to produce relatively low energy electron-positron pairs with an efficiency rating high enough to explain the observed luminosity of the Galactic center annihilation line. Virtually all of the gamma ray continuum radiation produced in the cascades would be beamed along the magnetic poles of the neutron star, and therefore probably would not be observed from earth. Some observational predictions generated by the proposed model for the Galactic center positron source are given.</style></abstract></record></records></xml>