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A Milliarcsecond Localization Associates FRB 20190417A with a Compact Persistent Radio Source and an Extreme Magnetoionic Environment

  • Authors: Alexandra M. Moroianu, Shivani Bhandari, Maria R. Drout, Jason W. T. Hessels, Danté 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, B. M. Gaensler, Marcin P. Gawroński, Marcello Giroletti, Adaeze L. Ibik, Ramesh Karuppusamy, Mattias Lazda, Calvin Leung, Michael Lindqvist, Kiyoshi W. Masui, Daniele Michilli, Kenzie Nimmo, Omar S. Ould-Boukattine, Ayush Pandhi, Zsolt Paragi, Aaron B. Pearlman, Weronika Puchalska, Paul Scholz, Kaitlyn Shin, Jurjen J. Sluman, Matteo Trudu, David Williams-Baldwin, Jun Yang

Alexandra M. Moroianu et al 2026 The Astrophysical Journal Letters 996 .

  • Provider: AAS Journals

Caption: Figure 1.

EVN dirty map of FRB 20190417A-PRS, as seen in the combined five epochs. A small bar in the upper right corner of the image shows a representative 50 pc transverse extent, for scale. Contour levels start at two times the rms noise level of 12 μJy beam−1 and increase by factors of ﹩\sqrt{2}﹩. The dashed circle shows the 1σ VLA positional uncertainty of PRS 20190417A-S1 (A. L. Ibik et al. 2024). The synthesized beam is represented by the ellipse in the lower left corner; it has major and minor axes of 32.7 and 30.6 mas, respectively, and a position angle of −10﹩\mathop{.}\limits^{\unicode{x000b0}}﹩8.

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