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The maximum luminosity of fast radio bursts

Lu, Wenbin and Kumar, Pawan (2019) The maximum luminosity of fast radio bursts. Monthly Notices of the Royal Astronomical Society: Letters, 483 (1). L93-L97. ISSN 1745-3925.

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Under the assumption that fast radio bursts (FRBs) are from coherent curvature emission powered by the dissipation of magnetic energy in the magnetosphere of neutron stars, we show that there is a maximum isotropic equivalent luminosity L_(max)∼(2×10^(47) ergs^(−1))min(ρ^2_6,B_(16)ρ^(4/3)_6ν^(−2/3)_9)⁠, where ρ_6=ρ/10km is the curvature radius of the magnetic field lines near the source region, B_(16)=B/10^(16) G is the local magnetic field strength, and ν_9 = ν/GHz is the FRB wave frequency. This is because the electric field responsible for accelerating the emitting particles becomes close to the quantum critical strength and is then quickly shielded by Schwinger pairs within a nano-second. Future observations should be able to measure this cut-off luminosity and hence provide a unique probe of the source location and magnetic field strength. We discuss the effects of L_(max) on the observed flux distributions for repeating bursts from the same object and for the entire FRB population.

Item Type:Article
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URLURL TypeDescription Paper
Lu, Wenbin0000-0002-1568-7461
Additional Information:© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2018 October 17. Received 2018 October 16; in original form 2018 July 17. Published: 23 October 2018. We thank Vikram Ravi for useful discussions. We also thank the referee for comments which improved the clarity of the presentation. This research benefited from interactions at the ZTF Theory Network Meeting, funded by the Gordon and Betty Moore Foundation through Grant GBMF5076. WL was supported by the David and Ellen Lee Fellowship at Caltech.
Funding AgencyGrant Number
Gordon and Betty Moore FoundationGBMF5076
David and Ellen Lee Postdoctoral ScholarshipUNSPECIFIED
Subject Keywords:stars: neutron – radio continuum: general
Issue or Number:1
Record Number:CaltechAUTHORS:20190905-103901533
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Official Citation:Wenbin Lu, Pawan Kumar, The maximum luminosity of fast radio bursts, Monthly Notices of the Royal Astronomical Society: Letters, Volume 483, Issue 1, February 2019, Pages L93–L97,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98431
Deposited By: Tony Diaz
Deposited On:05 Sep 2019 19:24
Last Modified:03 Oct 2019 21:41

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