University of Hertfordshire

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From the same journal

Galactic synchrotron emissivity measurements between 250° MWA

Research output: Contribution to journalArticlepeer-review


  • stw2959

    Final published version, 4.46 MB, PDF document


  • H. Su
  • N. Hurley-Walker
  • C. A. Jackson
  • N. M. McClure-Griffiths
  • S. J. Tingay
  • L. Hindson
  • P. Hancock
  • R. B. Wayth
  • B. M. Gaensler
  • L. Staveley-Smith
  • J. Morgan
  • M. Johnston-Hollitt
  • E. Lenc
  • M. E. Bell
  • J. R. Callingham
  • K. S. Dwarkanath
  • B. Q. For
  • A. D. Kapińska
  • B. McKinley
  • A. R. Offringa
  • And 3 others
  • P. Procopio
  • C. Wu
  • Q. Zheng
View graph of relations
Original languageEnglish
Pages (from-to)3163-3174
JournalMonthly Notices of the Royal Astronomical Society
Early online date17 Nov 2016
Publication statusPublished - 1 Mar 2017


Synchrotron emission pervades the Galactic plane at low radio frequencies, originating from cosmic ray electrons interacting with the Galactic magnetic field. Using a low-frequency radio telescope, the Murchison Widefield Array (MWA), we measure the free-free absorption of this Galactic synchrotron emission by intervening HII regions along the line of sight. These absorption measurements allow us to calculate the Galactic cosmic-ray electron emissivity behind and in front of 47 detected HII regions in the region $250^\circ


This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record, H. Su et al, 'Galactic synchrotron emissivity measurements between 250◦ <l <355◦ from the GLEAM survey with the MWA', MNRAS, 465(3): 3163-3174, first published online 17 November 2016, is available via doi: 10.1093/mnras/stw2959. © : 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.


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