Accreting X-ray pulsars are predicted to produce detectable gamma-ray lines at 2.2-67.5 MeV plus a 511 keV annihilation line, with observability limited by magnetospheric absorption and radiative deceleration.
Theory of Disk Accretion onto Magnetic Stars
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abstract
Disk accretion onto magnetic stars occurs in a variety of systems, including accreting neutron stars (with both high and low magnetic fields), white dwarfs, and protostars. We review some of the key physical processes in magnetosphere-disk interaction, highlighting the theoretical uncertainties. We also discuss some applications to the observations of accreting neutron stars and protostellar systems, as well as possible connections to protoplanetary disks and exoplanets.
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Gamma-ray lines, electron-positron annihilation, and possible radio emission in X-ray pulsars
Accreting X-ray pulsars are predicted to produce detectable gamma-ray lines at 2.2-67.5 MeV plus a 511 keV annihilation line, with observability limited by magnetospheric absorption and radiative deceleration.