The Radio-FIR correlation in the Milky Way
Abstract
We investigate the scale on which the correlation arises between the 843 MHz radio and the 60 micron far-infrared (FIR) emission from star forming regions in the Milky way. The correlation, which exists on the smallest scales investigated (down to ~4 pc), becomes noticeably tight on fields of size 30', corresponding to physical scales of ~20-50 pc. 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 q_mean 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.
Keywords
Cite
@article{arxiv.1006.4282,
title = {The Radio-FIR correlation in the Milky Way},
author = {J. Zhang and A. Hopkins and P. J. Barnes and M. Cagnes and Y. Yonekura and Y. Fukui},
journal= {arXiv preprint arXiv:1006.4282},
year = {2015}
}
Comments
7 pages, 4 figures, accepted for publication by PASA