Wave excitations from high dense and hot plasmas

In cosmic plasmas magnetized plasmas with high density and high temperature are often observed. In such plasmas, we investigate what kinds of interact ion and wave excitation are developed, by using two dimensional in real spa ce and three dimensional in velocity space fully relativistic electromagnet ic PIC code.(1)) As the remarkable results, strong electric fields are prod uced by the electron thermal expansion from the high density and high tempe rature region. And particles expanded by the thermal energy interact with b ackground cold plasma, resulting in several waves generated both perpendicu lar and parallel direction to the ambient magnetic field. We propose the ne w mechanism of 2w(e) mode excitation from the hot plasma.