Deep Synoptic Array Science: A 50 Mpc Fast Radio Burst Constrains the Mass of the Milky Way Circumgalactic Medium

• Published in: The Astronomical journal Vol. 169; no. 6; pp. 330 - 342
• Main Authors: Ravi, Vikram, Catha, Morgan, Chen, Ge, Connor, Liam, Cordes, James M., Faber, Jakob T., Lamb, James W., Hallinan, Gregg, Harnach, Charlie, Hellbourg, Greg, Hobbs, Rick, Hodge, David, Hodges, Mark, Law, Casey, Rasmussen, Paul, Sharma, Kritti, Sherman, Myles B., Shi, Jun, Simard, Dana, Somalwar, Jean J., Squillace, Reynier, Weinreb, Sander, Woody, David P., Yadlapalli, Nitika
• Format: Journal Article
• Language: English
• Published: The American Astronomical Society 02.06.2025; IOP Publishing
• Subjects: Barred spiral galaxies; Circumgalactic medium; Radio interferometers; Radio transient sources; Star formation; Warm ionized medium

We present the Deep Synoptic Array (DSA-110) discovery and interferometric localization of the so far nonrepeating FRB 20220319D. The FRB originates in a young, rapidly star-forming barred spiral galaxy, IRAS 02044+7048, at just 50 Mpc. Although the NE2001 and YMW16 models for the Galactic interstel...