Hot-ion Bernstein wave with finite kparallel

The complex roots of the hot plasma dispersion relation in the ion cyclotron range of frequencies have been surveyed. Consistent with current understanding, the cold plasma fast wave appears at low values of perpendicular wave number kperpendicular, followed by the well-known Bernstein wave at higher kperpendicular. At still higher kperpendicular there can be two previously unappreciated hot plasma waves with relatively little sensitivity to frequency, in contrast to the Bernstein wave which is characterized by large changes in kperpendicular for small changes in frequency or magnetic field. The latter waves exist only for relatively large kparallel, the wave number parallel to the magnetic field. Both waves are strongly absorbed if the electron temperature is near the ion temperature, but not in a hot-ion, cold-electron, plasma