Other
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..232b&link_type=abstract
NOAO Proposal ID #2001A-0232
Other
Scientific paper
We propose to continue our survey of giant HII regions at JHK. Our eventual goals are to characterize their stellar content, investigate the nature of massive star formation, and to use the derived infrared spectral types to determine distances and as probes of Galactic structure. The infrared photometry will be used to identify massive star and young stellar object candidates for follow-up spectroscopy (on 4m and 8m class telescopes). Our program and other recent near infrared observations are producing examples of clusters of newly born massive stars. This mode of star formation is virtually unexplored in the Galaxy due to obscuration by dust toward star forming regions. In addition, to the best of our knowledge, our present observations and those by Hanson et al. (1997) form the largest known sample of massive young stellar objects (YSO). We have already identified O stars and massive YSOs in a number of GHII regions and will continue our succesful survey in other GHII regions using 4m imaging for new clusters and 4m spectroscopy for clusters for which we already have imaging data. Further, we will use Gemini to go farther down the main sequence spectroscopically in W31 producing a more accurate mass, age, and luminosity for this rich young cluster.
Blum Robert
Conti Peter
Damineli Augusto
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