Neutron star magnetospheres: the binary pulsar, Crab and magnetars
A number of disparate observational and theoretical pieces of evidence indicate that, contrary to the conventional wisdom, neutron stars closed field lines are populated by dense, hot plasma and may be responsible for producing some radio and high energy emission. This conclusion is based on eclipse modeling of the binary pulsar system PSR J0737- 3039A/B (Lyutikov & Thompson 2005), a quantitative theory of Crab giant pulses (Lyutikov 2007) and a number of theoretical works related to production of non-thermal spectra in magnetars through resonant scattering. In magnetars, dense pair plasma is produced by twisting magnetic field lines and associated electric fields required to lift the particles from the surface. In long period pulsars, hot particles on closed field lines can be efficiently trapped by magnetic mirroring, so that relatively low supply rate, e. g. due to a drift from open field lines, may result in high density. In short period pulsars, magnetic mirroring does not work; large densities may stillbe expected at the magnetic equator near the Y-point.
M. Lyutikov
Department of Physics, Purdue University, 525 Northwestern Avenue West Lafayette, IN 47907
国际会议
紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)
安徽黄山
英文
77-84
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）