The radio-FIR correlation in the Milky way

J. Zhang, A. Hopkins*, P. J. Barnes, M. Cagnes, Y. Yonekura, Y. Fukui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We investigate the scale on which the correlation arises between the 843MHz radio and the 60 μm far-infrared (FIR) emission from star forming regions in the Milky way. The correlation, which exists on the smallest scales investigated (down to ≈4pc), becomes noticeably tight on fields of size 30′, corresponding to physical scales of ≈20-50pc. The FIR to radio flux ratio on this scale is consistent with the radio emission being dominated by thermal emission. We also investigate the location dependence of q mean, a parameter measuring the mean FIR to radio flux ratio, of a sample of star forming regions. We show that qmean displays a modest dependence on galactic latitude. If this is interpreted as a dependence on the intensity of star formation activity, the result is consistent with studies of the Large Magellanic Cloud (LMC) and other nearby galaxies that show elevated values for q in regions of enhanced star formation.

Original languageEnglish
Pages (from-to)340-346
Number of pages7
JournalPublications of the Astronomical Society of Australia
Issue number3
Publication statusPublished - 2010
Externally publishedYes


  • galaxies: evolution
  • galaxies: spiral
  • galaxies: starburst
  • Galaxy: general
  • infrared: galaxies
  • radio continuum: galaxies


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