2019/01/10 by Maxim Lyutikov, Lyutikov, Maxim, Mohammad Rafat +1
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Plasma Physics (physics.plasm-ph) #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.1901.03260
openalex publication_date 2019/01/10 · openalex created_date 2019/01/25 · openalex updated_date 2026/07/28
We discuss physical constrains that observations of high brightness temperature coherent radio emission, with brightness temperatures as high as Tb ∼ 1035 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 as analogues of type-III Solar radio bursts produced by reconnection plasma beams within magnetospheres of highly magnetized neutron stars.