Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725823c&link_type=abstract
American Astronomical Society, AAS Meeting #217, #258.23; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astrophysics
Scientific paper
A promising new diagnostic for identifying actively accreting massive young stellar objects (MYSOs) has emerged from large-scale Spitzer surveys of the Galactic plane: extended emission in the IRAC 4.5 micron band, believed to trace shocked molecular gas in active protostellar outflows. Over 300 extended 4.5 micron sources (called EGOs, Extended Green Objects, for the common coding of the [4.5] band as green in 3-color composite IRAC images), have been cataloged in the GLIMPSEI survey area.
I will present results from cm-wavelength surveys of GLIMPSE EGOs designed to constrain their evolutionary state, including a Nobeyama 45-m water maser and ammonia survey, and a deep, high-resolution VLA cm continuum survey.
Support for this work was provided by NSF grant AST-0808119 and by a NSF Astronomy and Astrophysics Postdoctoral Fellowship to C. Cyganowski.
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