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

Ravi, V.; Shannon, Ryan; Bailes, M.; Bannister, K.; Bhandari, S.; Bhat, N.; Burke-Spolaor, S.; Caleb, M.; Flynn, C.; Jameson, A.; Johnston, S.; Keane, E.; Kerr, M.; Tiburzi, C.; Tuntsov, A.; Vedantham, H.

doi:10.1126/science.aaf6807

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Authors

Ravi, V.

Shannon, Ryan

Bailes, M.

Bannister, K.

Bhandari, S.

Bhat, N.

Burke-Spolaor, S.

Caleb, M.

Flynn, C.

Jameson, A.

Johnston, S.

Keane, E.

Kerr, M.

Tiburzi, C.

Tuntsov, A.

Vedantham, H.

Date

2016

Type

Journal Article

Metadata

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Citation

Ravi, V. and Shannon, R. and Bailes, M. and Bannister, K. and Bhandari, S. and Bhat, N. and Burke-Spolaor, S. et al. 2016. The magnetic field and turbulence of the cosmic web measured using a brilliant fast radio burst. Science. 354 (6317): pp. 1249-1252.

Source Title

Science

DOI

10.1126/science.aaf6807

School

Curtin Institute of Radio Astronomy (Physics)

URI

http://hdl.handle.net/20.500.11937/22740

Collection

Curtin Research Publications

Abstract

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 parsecs per cubic centimeter), exceptionally intense (120 ± 30 janskys), linearly polarized, scintillating burst (FRB 150807) that we directly localize to 9 square arc minutes. On the basis of a low Faraday rotation (12.0 ± 0.7 radians per square meter), we infer negligible magnetization in the circum-burst plasma and constrain the net magnetization of the cosmic web along this sightline to <21 nanogauss, parallel to the line-of-sight. The burst scintillation suggests weak turbulence in the ionized intergalactic medium.

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