http://arxiv.org/abs/1901.03260
We discuss physical constrains that observations of high brightness temperature coherent radio emission, with brightness temperatures as high as $T_b \sim 10^{35}$ K, impose on the plasma parameters at relativistically moving astrophysical sources. High brightness temperatures imply a minimal plasma energy density at the source. Additional important constraints come from the fact that resonantly emitting particles lose most of their energy to non-resonant inverse Compton and synchrotron processes.
We also interpret recent observations of high-to-low frequency drifting features in the spectra of repeating FRBs, FRB121102 and FRB180814, as analogues of type-III Solar radio bursts produced by reconnection plasma beams within magnetospheres of highly magnetized neutron stars.
M. Lyutikov
Fri, 11 Jan 19
8/45
Comments: N/A