Astrophysical wake acceleration driven by relativistic Alfvenic pulse emitted from bursting accretion disk

Abstract

We consider that electromagnetic pulses produced in the jets of the innermost part of the accretion disk accelerate charged particles (protons, ions, electrons) to very high energies including energies above 1020 eV for the case of protons and nucleus and 1012-15 eV for electrons by electromagnetic wave-particle interaction. The episodic eruptive accretion in the disk by the magneto-rotational instability gives rise to strong electro-magnetic pulses, which act as the driver of the collective accelerating ponderomotive force. The accelerated hadrons (protons and nuclei) are released to the intergalactic space to be ultra-high energy cosmic rays. Some of them collide with the protons in the interstellar medium to produce secondary particles, such as neutrinos and gamma-ray photons. The high-energy electrons, on the other hand, emit photons in the collisions with electromagnetic disturbances to produce various non-thermal emissions (radio, IR, visible, UV, and gamma-rays) of active galactic nuclei. Applying the bow wakefield acceleration theory to eight galaxies (M82, NGC0253, NGC4945, NGC1068, NGC6814, Cen A, M87, and For A), we find two starburst galaxies (M82 and NGC0253), one Seyfert galaxy (NGC4945), and one radio galaxy (Cen A) are promising as UHECR (Ultra-High Energy Cosmic-ray) sources and can form hot spots around them. The sky map of these four galaxies is consistent to the arrival direction analysis of the UHECRs. In particular, M82 seams responsible to form the northern hot spot suggested by TA group.