High resolution submillimeter observations of massive protostars

  • C. L. Brogan
  • T. R. Hunter
  • R. Indebetouw
  • C. J. Chandler
  • Y. L. Shirley
  • R. Rao
  • A. P. Sarma
Conference paper

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.

Keywords

Astrochemistry Stars: formation 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • C. L. Brogan
    • 1
  • T. R. Hunter
    • 1
  • R. Indebetouw
    • 2
  • C. J. Chandler
    • 3
  • Y. L. Shirley
    • 4
  • R. Rao
    • 5
  • A. P. Sarma
    • 6
  1. 1.NRAOCharlottesvilleUSA
  2. 2.University of VirginiaCharlottesvilleUSA
  3. 3.NRAOSocorroUSA
  4. 4.University of ArizonaTucsonUSA
  5. 5.Institute of Astronomy and AstrophysicsAcademia SinicaTaipeiTaiwan
  6. 6.Depaul UniversityChicagoUSA

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