3 mm line survey towards a new sample of massive young stellar objets: GLIMPSE-identified EGOs

Details 3 mm line survey towards a new sample of massive young stellar objets: GLIMPSE-identified EGOs 3 mm line survey towards a new sample of massive young stellar objets: GLIMPSE-identified EGOs

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2050c&link_type=abstract

ATNF proposal M393, Semester: April, 2009

Computer Science

Stellar, Mopra

Scientific paper

This project will use the ATNF Mopra 22-m antenna to perform a systemic 3 mm spectral line survey toward a new sample (total 269 sources) of massive young stellar objects. These objects, called Extended Green Objects (EGOs) have been identified from the Spitzer GLIMPSE survey as being associated with ongoing outflows. These observations will mainly focus on: 1) A search for class I 95 GHz methanol masers in outflow environments associated with EGOs, and determine whether the detection rate of class I methanol masers are higher in outflow environment as is predicted by theory; 2) to compare with the results from our ongoing project searching for class II 6.7 GHz methanol masers with the University of Tasmania radio telescopes, and investigate the relationship between class I and class II methanol masers; 3) search for evidence of outflow and infall in EGOs through observations of optically thick lines (CS and HNC) and estimate the cloud parameters (e.g. temperature and column density) through a series of CH3CN lines. The combination of these three will help us understand the massive star formation process and dynamics.

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