Abstract
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 language | English |
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Pages (from-to) | 340-346 |
Number of pages | 7 |
Journal | Publications of the Astronomical Society of Australia |
Volume | 27 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2010 |
Externally published | Yes |
Keywords
- galaxies: evolution
- galaxies: spiral
- galaxies: starburst
- Galaxy: general
- infrared: galaxies
- radio continuum: galaxies