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The magnetic field and turbulence of the cosmic web measured using a brilliant fast radio burst

Ravi, Vikram and Shannon, R. M. and Bailes, M. and Bannister, K. and Bhandari, S. and Bhat, N. D. R. and Burke-Spolaor, S. and Caleb, M. and Flynn, C. and Jameson, A. and Johnston, S. and Keane, E. F. and Kerr, M. and Tiburzi, C. and Tuntsov, A. V. and Vedantham, H. K. (2016) The magnetic field and turbulence of the cosmic web measured using a brilliant fast radio burst. Science, 354 (6317). pp. 1249-1252. ISSN 0036-8075.

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Fast radio bursts (FRBs) are millisecond-duration events thought to originate beyond the Milky Way galaxy. Uncertainty surrounding the burst sources, and their propagation through intervening plasma, has limited their use as cosmological probes. We report on a mildly dispersed (dispersion measure 266.5 ± 0.1 pc cm^(−3)), exceptionally intense (120 ± 30 Jy), linearly polarized, scintillating burst (FRB 150807) that we directly localize to 9 arcmin^2. Based on a low Faraday rotation (12.0 ± 0.7 rad m^(−2)), we infer negligible magnetization in the circum-burst plasma and constrain the net magnetization of the cosmic web along this sightline to <21 nG, parallel to the line-of-sight. The burst scintillation suggests weak turbulence in the ionized intergalactic medium.

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Ravi, Vikram0000-0002-7252-5485
Vedantham, H. K.0000-0002-0872-181X
Additional Information:© 2016 American Association for the Advancement of Science. 15 March 2016; accepted 27 October 2016. Published online 17 November 2016. We thank both D. Schnitzeler and the SUPERB collaboration for useful feedback on the manuscript. The Parkes radio telescope is part of the Australia Telescope National Facility which is funded by the Commonwealth of Australia for operation as a National Facility managed by Commonwealth Science and Industrial Research Organization (CSIRO). N.D.R.B. is supported by a Curtin Research Fellowship. The data for FRB 150807 reported in this paper are made available through the CSIRO data access portal at .
Funding AgencyGrant Number
Commonwealth of AustraliaUNSPECIFIED
Commonwealth Scientific and Research Organization (CSIRO)UNSPECIFIED
Curtin UniversityUNSPECIFIED
Issue or Number:6317
Record Number:CaltechAUTHORS:20161115-114958283
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Official Citation:The magnetic field and turbulence of the cosmic web measured using a brilliant fast radio burst BY V. RAVI, R. M. SHANNON, M. BAILES, K. BANNISTER, S. BHANDARI, N. D. R. BHAT, S. BURKE-SPOLAOR, M. CALEB, C. FLYNN, A. JAMESON, S. JOHNSTON, E. F. KEANE, M. KERR, C. TIBURZI, A. V. TUNTSOV, H. K. VEDANTHAM Science 354 (6317), 1249-1252. [doi: 10.1126/science.aaf6807]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72033
Deposited By: Katherine Johnson
Deposited On:17 Nov 2016 19:23
Last Modified:03 Oct 2019 16:13

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