Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.9904w&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #99.04; Bulletin of the American Astronomical Society, Vol. 24, p.1276
Astronomy and Astrophysics
Astronomy
Scientific paper
Pulsar emission models often invoke wave instabilities in counter-streaming pair plasma as a mechanism to impose coherence on the source. The plasma two-stream instability has figured prominently in the models. Although cold plasma theory predicts rapid growth of charge density waves, there is persistent doubt on the viability of the mechanism when finite temperature effects are included. This is a relevant question because pair plasmas created by high energy photons in the neutron star environment are expected to have a broad distribution of energy, perhaps with effective temperature parameters KBT/mc(2) ~ 100. We attempt to resolve the issue of instability in a relativistically hot system with a complete kinetic treatment of the two-streams. The appropriate dispersion relation is based on a relativistic and covariant expression of the plasma dispersion function, which involves an integral over a relativistic Maxwellian distribution. Numerical solutions for wave frequency and growth will be presented.
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