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Mapping Obscured Star Formation in the Host Galaxy of FRB 20201124A

  • Authors: Yuxin Dong, 雨欣 董, Tarraneh Eftekhari, Wen-fai Fong, Adam T. Deller, Alexandra G. Mannings, Sunil Simha, Navin Sridhar, Marc Rafelski, Alexa C. Gordon, Shivani Bhandari, Cherie K. Day, Kasper E. Heintz, Jason W. T. Hessels, Joel Leja, Clancy W. James, Charles D. Kilpatrick, Elizabeth K. Mahony, Benito Marcote, Ben Margalit, Kenzie Nimmo, J. Xavier Prochaska, Alicia Rouco Escorial, Stuart D. Ryder, Genevieve Schroeder, Ryan M. Shannon, Nicolas Tejos

Yuxin Dong et al 2024 The Astrophysical Journal 961 .

  • Provider: AAS Journals

Caption: Figure 1.

VLA images with natural weighting of the host galaxy of FRB 20201124A taken in the extended A-array configuration in three bands: 6 GHz (top left; 10″ × 10″, top right; zoomed in, 6″ × 6″), 3 GHz (bottom left; 10″ × 10″), and 1.5 GHz (bottom right; 10″ × 10″). The beam size is displayed in the bottom left corner at each frequency. In each panel, the FRB position is represented as a red star, and the host centroid determined from HST imaging is marked as a yellow cross. Contours denote −2σ (dotted, gray), 2σ (dark blue), 4σ (light blue), and 6σ (white) significance levels, where σ = 13.95 μJy beam−1 at 1.5 GHz, 6.29 μJy beam−1 at 3 GHz, and 1.94 μJy beam−1 at 6 GHz. The radio emission is roughly aligned with the host center in all frequencies. While we are unable to resolve the smaller-scale structures at 1.5 and 3 GHz, the 6 GHz emission clearly exhibits complex morphology, with one peak located near the FRB position and another closer to the host galaxy center.

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