A Radio Study of Persistent Radio Sources in Nearby Dwarf Galaxies: Implications for Fast Radio Bursts

Abstract

Copyright and License

© 2024. The Author(s). Published by the American Astronomical Society.

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Acknowledgement

The authors are grateful for the helpful discussions with Dillon Dong and Joseph Michail. Y.D. is supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1842165. The Fong Group at Northwestern acknowledges support by the National Science Foundation under grant Nos. AST-2206494 and AST-2308182 and CAREER grant No. AST-2047919. T.E. is supported by NASA through the NASA Hubble Fellowship grant HST-HF2-51504.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. S.B. is supported by the Dutch Research Council (NWO) Veni Fellowship (VI.Veni.212.058). Research by the AstroFlash group at the University of Amsterdam, ASTRON, and JIVE is supported in part by a Vici grant from the Dutch Scientific Research Council (Nederlandse Oranisatie voor Wetenschappelijk Onderzoek or NWO; PI Hessels; VI.C.192.045), as well as the European Union's Horizon 2020 research and innovation program through the ERC Advanced Grant "EuroFlash" (PI Hessels; grant agreement No. 101098079). W.F. gratefully acknowledges support by the David and Lucile Packard Foundation, the Alfred P. Sloan Foundation, and the Research Corporation for Science Advancement through Cottrell Scholar Award No. 28284. N.S. acknowledges the support from NASA (grant No. 80NSSC22K0332), NASA FINESST (grant No. 80NSSC22K1597), a Columbia University Dean's fellowship, and a grant from the Simons Foundation. A.E.R. acknowledges support provided by the NSF through CAREER award 2235277 and NASA through EPSCoR grant No. 80NSSC20M0231. B.M. acknowledges financial support from the State Agency for Research of the Spanish Ministry of Science and Innovation under grant PID2019-105510GB-C31/AEI/10.13039/501100011033 and through the Unit of Excellence María de Maeztu 2020–2023 award to the Institute of Cosmos Sciences (CEX2019-000918-M). The Berger Time-Domain Group at Harvard is supported by NSF and NASA grants.

The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The European VLBI Network is a joint facility of independent European, African, Asian, and North American radio astronomy institutes. Scientific results from data presented in this publication are derived from the following EVN project code(s): EO018. W. M. Keck Observatory and MMT Observatory access was supported by Northwestern University and the Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.

Facilities

VLA - Very Large Array, EVN - European VLBI Network, Keck:II - KECK II Telescope (DEIMOS), MMT - MMT at Fred Lawrence Whipple Observatory (Binospec).

Software References

AIPS (Greisen 2003), Astropy (Astropy Collaboration et al. 2013, 2018, 2022), CASA (McMullin et al. 2007; CASA Team et al. 2022), DIFMAP (Shepherd et al. 1994), GALFIT (Peng et al. 2002, 2010), Heimdall, Matplotlib (Hunter 2007), Numpy (Harris et al. 2020), PHOTUTILS (Bradley et al. 2021), SAOImage DS9 (Joye & Mandel 2003), SciPy (Virtanen et al. 2020), SFXC (Keimpema et al. 2015).