Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534505c&link_type=abstract
American Astronomical Society, AAS Meeting #215, #345.05; Bulletin of the American Astronomical Society, Vol. 42, p.452
Astronomy and Astrophysics
Astronomy
Scientific paper
We present multi-frequency, spectral line and continuum observations of the region surrounding the massive young star NGC 7538 IRS1. Observations of HCO+, multiple CO lines (12CO, 13CO, C18O, C17O; J=1-0 and/or 2-1), and 1.3 and 2.7 continuum emission are presented. Our observations using CARMA (Combined Array for Research in Millimeter Wave Astronomy) have an angular resolution of up to 0.8" and extend over a field of several arcminutes at a resolution of 2.8". Self-calibration of the data is provided by a VLA Qband (43 GHz) image.
We find that IRS1 drives a large (1-2' per lobe) bipolar outflow which is well-aligned with the free-free jet from IRS1, roughly north-south. We also find direct evidence of both infall and a circumstellar disk. The prospects for our upcoming observing campaign with a resolution of 0.25" in 1.3 mm continuum are discussed. These results are placed into the context of the larger cloud which is being imaged over a 3' by 4' field with CARMA+FCRAO and Onsala recovering single dish flux over that field.
Corder Stuartt A.
Sandell Goeran
Wright Malcolm
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