Whistler solitons in plasma with anisotropic hot electron admixture

The longitudinal and transverse modulation instability of whistler waves in plasma, with a small admixture of hot anisotropic electrons, is discussed. If the hot particles temperature anisotropy is positive, it is found that, in such plasma, longitudinal perturbations can lead to soliton formation f or frequencies forbidden in cold plasma. The soliton is enriched by hot par ticles. The frequency region unstable to transverse modulation in cold plas ma in the presence of hot electrons is divided by stable domains. For both cases the role of hot electrons is more significant for whistlers with smal ler frequencies. (C) 1999 American Institute of Physics. [S1070-664X(99)003 10-9].