Novel Processes to Produce High Energy Particles in Plasma Surrounding Compact Binaries

The existence of plasmas around black holes was proposed as early as 1968 and in fact the first identification of galactic black holes was through the radiation mission of the plasmas associated with them. When a binary of two neutron stars or two black holes is relatively close to collapse, magneto gravitational modes [1] can be sustained by the oscillations of the surrounding plasma density having frequencies related to the orbiting frequency of the binary components. The plasma modes introduced for this are of the ballooning type (in the vertical direction) and have the frequencies of corresponding compressional Alf$\'e$n waves. Anew form of ``damping'' associated with the relevant mode particle resonances is identified [1]. \\ $[1]$ B. Coppi, Plasma Physics Reports, 45, 5, (2019).