Publication: Monthly Notices of the Royal Astronomical Society, Vol. 503, 3592–3595 (2021) (Download the paper)
Synchrotron emission from a nearby zone of Sgr A∗
Quasi-linear diffusion (QLD), driven by cyclotron instability, is proposed as a mechanism for the possible generation of synchrotron emission in the nearby zone of Sgr A∗. For physically reasonable parameters, QLD, by causing non-zero pitch angle scattering, lets electrons with relativistic factors of the order of 108 emit synchrotron radiation in the hard X-ray spectral band ∼120 keV.