Spitzer Observations of the Far-Infrared Radio Continuum Correlation in the Small Magellanic Cloud

Details Spitzer Observations of the Far-Infrared Radio Continuum Correlation in the Small Magellanic Cloud Spitzer Observations of the Far-Infrared Radio Continuum Correlation in the Small Magellanic Cloud

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20917807s&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #178.07; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a study of the far-IR radio continuum correlation within the Small Magellanic Cloud using MIPS far-infrared maps obtained as part of the Spitzer Survey of the SMC (S3MC) and radio continuum maps from a combined ATCA-Parkes survey. With these high resolution data, we can study the correlation within the SMC down to scales of about 35 parsecs. We find that there is a correlation even on these small linear scales. In general, the slope of the correlation is approximately unity, except in H II regions where we see an excess of radio continuum relative to the far-IR. Using the MCELS H-alpha image we decompose the radio continuum maps into thermal and non-thermal components and show that the excess corresponds to a higher thermal fraction in H II regions. We also find that regions with molecular gas (as determined by CO) have an excess of far-IR emission relative to radio continuum. We examine these behaviors at various resolutions and discuss their origins and relation to the global far-IR radio continuum correlation.
This work is based on observations made with the Spitzer Space Telescope (NASA-JPL Spitzer grant 1264151 awarded to Cycle 1 project 3316). K. S. is supported by the NSF Graduate Research Fellowship.

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