2019/05/16 by M. F. Bietenholz, Bietenholz, Michael F., N. Bartel +1
Physics and Astronomy · #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.1905.06690
openalex publication_date 2019/05/16 · openalex created_date 2022/07/29 · openalex updated_date 2026/07/28
We discuss our VLA and VLBI observations of supernova 1986J, which is\ncharacterized by a compact radio-bright component within the expanding shell of\nejecta. No other supernova (SN) has such a central component at cm wavelengths.\nThe central component therefore provides a unique probe of the propagation of\nradio signals at cm wavelengths through the ejecta of a young SN. Such a probe\nis important in the context of Fast Radio Bursts (FRB), which, in many models,\nare thought to be produced by young magnetars or neutron stars. The FRB signals\nwould therefore have to propagate through the expanding SN ejecta. Our\nobservations of the Type II SN 1986J show that the ejecta would remain opaque\nto cm-wave emission like FRBs for at least several decades after the explosion,\nand by the time the ejecta have become transparent, the contribution of the\nejecta to the dispersion measure is likely small.\n