On the 440 keV line in the Crab Nebula pulsar

Details On the 440 keV line in the Crab Nebula pulsar On the 440 keV line in the Crab Nebula pulsar

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..489b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 489-493. Research supported by MURST.

Astronomy and Astrophysics

Astrophysics

15

Crab Nebula, Gamma Rays, Positron Annihilation, Pulsars, Stellar Spectra, Compton Effect, Electrodynamics, Elementary Particles, Emission Spectra, Line Spectra, Red Shift

Scientific paper

Observations of an emission line at 440 keV from the Crab Nebula pulsar are considered. A picture is proposed where the line is due to redshifted positron annihilation in the neutron star crust. The positrons are produced by photons of MeV energy hitting the pulsar cap, which in turn are generated by inverse Compton scattering of electrons in an inner electric gap (E x B not equal to 0). It is shown that the picture appears in agreement with basic constraints of pulsar electrodynamics and follows the main ideas of the pulsar model of Ruderman and collaborators.

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