The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102

Tendulkar, Shriharsh P.; Bassa, C.; Cordes, J. M.; Bower, Geoffrey C.; Law, Casey; Chatterjee, Shami; Adams, Elizabeth A. K.; Bogdanov, Slavko; Burke-Spolaor, Sarah; Butler, Bryan; Demorest, Paul B.; Hessels, J. W. T.; Kaspi, V. M.; Lazio, T. Joseph W.; Maddox, Natasha; Marcote, B.; McLaughlin, M. A.; Paragi, Z.; Ransom, S. M.; Scholz, Paul; Seymour, Andrew; Spitler, L. G.; Langevelde, Huib Jan van; Wharton, Robert

doi:10.3847/2041-8213/834/2/l7

articleThe Astrophysical Journal LettersJan 4, 2017BRONZE OA

The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102

SPShriharsh P. Tendulkar CBC. Bassa JMJ. M. Cordes GCGeoffrey C. Bower CLCasey Law

McGill University · Netherlands Institute for Radio Astronomy · +12 more institutions

Indexed inarxivcrossrefdoaj

Abstract

Abstract The precise localization of the repeating fast radio burst (FRB 121102) has provided the first unambiguous association (chance coincidence probability p ≲ 3 × 10 −4 ) of an FRB with an optical and persistent radio counterpart. We report on optical imaging and spectroscopy of the counterpart and find that it is an extended (0.″6–0.″8) object displaying prominent Balmer and [O iii ] emission lines. Based on the spectrum and emission line ratios, we classify the counterpart as a low-metallicity, star-forming, m r ′ = 25.1 AB mag dwarf galaxy at a redshift of z = 0.19273(8), corresponding to a luminosity distance of 972 Mpc. From the angular size, the redshift, and luminosity, we estimate the host galaxy…

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Topics & keywords

Topics

Keywords

Physics
Astrophysics
Galaxy
Redshift
Fast radio burst
Luminosity
Star formation

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