Tootfinder

A milliarcsecond localization associates FRB 20190417A with a compact, luminous persistent radio source and an extreme magneto-ionic environment
Alexandra M. Moroianu, Shivani Bhandari, Maria R. Drout, Jason W. T. Hessels, Dant\'e M. Hewitt, Franz Kirsten, Benito Marcote, Ziggy Pleunis, Mark P. Snelders, Navin Sridhar, Uwe Bach, Emmanuel K. Bempong-Manful, Vladislavs Bezrukovs, Richard Blaauw, Justin D. Bray, Salvatore Buttaccio, Shami Chatterjee, Alessandro Corongiu, Roman Feiler,…

A milliarcsecond localization associates FRB 20190417A with a compact, luminous persistent radio source and an extreme magneto-ionic environment
We report the milliarcsecond localization of a high (1379 pc/cc) dispersion measure (DM) repeating fast radio burst, FRB 20190417A. Combining European VLBI Network detections of five repeat bursts, we confirm the FRB's host to be a low-metallicity, star-forming dwarf galaxy at z = 0.12817, analogous to the hosts of FRBs 20121102A, 20190520B and 20240114A. We also show that FRB 20190417A is spatially coincident with a compact, luminous persistent radio source (PRS). Visibility-domain model fitti…