Physics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934911s&link_type=abstract
American Astronomical Society, AAS Meeting #219, #349.11
Physics
Scientific paper
Radio continuum images of ultra-compact HII regions have played an important role in investigating the rate of massive star formation in the Milky Way Galaxy. To fully comprehend the physics of ultra-compact HII regions multi wavelength, and multi-resolution studies are necessary. Here we present radio continuum images obtained with the VLA toward the prominent ultra-compact HII region G31.41+0.31. The observations were made in the A-configuration at 20 cm, 6 cm, 3.5 cm, 1.3 cm and the A, and B configurations at 0.7 cm. We use this data to investigate the morphology of the region, the ionization requirements and the probable history of massive star formation. We find that the ultra-compact HII region is part of a much larger structure visible at 20 cm, and likely contains several generations of massive star formation. We also include NIR and Mid-IR images, to obtain information about the stellar component in the region.
The NRAO is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc. Part of this research was carried out under the auspices of the National Science Foundation's Research Experience for Undergraduates (REU) program at the NRAO, and we gratefully acknowledge the funding for this program.
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