1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6720
Full metadata record
DC FieldValueLanguage
dc.contributor.authorSu, H.-
dc.contributor.authorHurley-Walker, N.-
dc.contributor.authorDwarakanath, K.S.-
dc.contributor.author+23 Co-authors-
dc.date.accessioned2017-09-07T07:01:20Z-
dc.date.available2017-09-07T07:01:20Z-
dc.date.issued2017-03-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2017, Vol. 465, p3163-3174en_US
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 - (online)-
dc.identifier.urihttp://hdl.handle.net/2289/6720-
dc.descriptionOpen Accessen_US
dc.description.abstractSynchrotron 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 H II 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 H II regions in the region 250° < l < 355°, |b| < 2°. We find that all average emissivities between the H II regions and the Galactic edge along the line of sight (εb) are in the range of 0.39 ∼ 1.45 K pc-1 with a mean of 0.77 K pc-1 and a variance of 0.14 K pc-1 at 88 MHz. Our best model, the two-circle model, divides the Galactic disc into three regions using two circles centring on the Galactic Centre. It shows a high emissivity region near the Galactic Centre, a low emissivity region near the Galactic edge, and a medium emissivity region between these two regions, contrary to the trend found by previous studies.en_US
dc.language.isoenen_US
dc.publisherOxford University Press for the Royal Astronomical Societyen_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2017MNRAS.465.3163Sen_US
dc.relation.urihttp://arxiv.org/abs/1611.05446en_US
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stw2959en_US
dc.rights2017 The authors & the Royal Astronomical Societyen_US
dc.subjectErrata Erratum-
dc.subjectCosmic rays-
dc.titleGalactic synchrotron emissivity measurements between 250° < l < 355° from the GLEAM survey with the MWAen_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2017_MNRAS_465_3163.pdfOpen Access4.57 MBAdobe PDFView/Open
Erratum_2017_MNRAS_272_828-834.pdfOpen access522.73 kBAdobe PDFView/Open
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.