A Local Universe Host for the Repeating Fast Radio Burst FRB 20181030A
M. Bhardwaj, A. Yu. Kirichenko, D. Michilli, Y. D. Mayya, V. M. Kaspi,, B. M. Gaensler, M. Rahman, S. P. Tendulkar, E. Fonseca, Alexander Josephy, C., Leung, Marcus Merryfield, Emily Petroff, Z. Pleunis, Pranav Sanghavi, P., Scholz, K. Shin, Kendrick M. Smith, I. H. Stairs

TL;DR
This paper localizes a repeating FRB to a nearby spiral galaxy, NGC 3252, and discusses implications for FRB origins, host environments, and emission models, highlighting its significance for future multi-wavelength studies.
Contribution
The paper precisely localizes FRB 20181030A to NGC 3252 and rules out dwarf galaxy hosts, providing new insights into FRB host environments and challenging existing magnetar-based models.
Findings
FRB localized to NGC 3252 with high confidence
No dwarf galaxy host within the localization region
Persistent radio source limit significantly below that of FRB 20121102A
Abstract
We report on the host association of FRB 20181030A, a repeating fast radio burst (FRB) with a low dispersion measure (DM, 103.5 pc cm) discovered by CHIME/FRB Collaboration et al. (2019a). Using baseband voltage data saved for its repeat bursts, we localize the FRB to a sky area of 5.3 sq. arcmin (90% confidence). Within the FRB localization region, we identify NGC 3252 as the most promising host, with an estimated chance coincidence probability . Moreover, we do not find any other galaxy with M AB mag within the localization region to the maximum estimated FRB redshift of 0.05. This rules out a dwarf host 5 times less luminous than any FRB host discovered to date. NGC 3252 is a star-forming spiral galaxy, and at a distance of 20 Mpc, it is one of the closest FRB hosts discovered thus far. From our archival radio data search, we…
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