High resolution submillimeter observations of massive protostars |
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| Authors: | C L Brogan T R Hunter R Indebetouw C J Chandler Y L Shirley R Rao A P Sarma |
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| Institution: | (1) NRAO, 520 Edgemont Rd, Charlottesville, VA 22903, USA;(2) University of Virginia, P.O. Box 3818, Charlottesville, VA 22903-0818, USA;(3) NRAO, P.O. Box 0, Socorro, NM 87801, USA;(4) University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA;(5) Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan;(6) Depaul University, 2219 North Kenmore Avenue, Byrne Hall 211, Chicago, IL 60614, USA |
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| Abstract: | We describe results from recent Submillimeter Array observations of massive protostellar objects (CepheusA-East, NGC7538 IRS1,
and G5.89-0.39) with resolutions ranging from 0.8″ to 2″. A wide range of spectral and continuum properties are observed,
with one unifying theme: at these resolutions all of the studied sources reveal multiple submillimeter cores. Some are observed
to have cm-wavelength counterparts, and others not, suggesting a range of evolutionary stages coexisting in close proximity.
In the presence of such complexity and multiplicity of sources, these data suggest that the interpretation of diagnostics
such as kinematic velocity gradients and temperatures that are strongly dependent on spatial resolution should be approached
cautiously. |
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| Keywords: | Astrochemistry Stars: formation |
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