Millimeter-wavelength aperture synthesis observations of massive star-forming regions in Sagittarius B2

Details Millimeter-wavelength aperture synthesis observations of massive star-forming regions in Sagittarius B2 Millimeter-wavelength aperture synthesis observations of massive star-forming regions in Sagittarius B2

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402..238l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 402, no. 1, p. 238-248.

Astronomy and Astrophysics

Astrophysics

44

Emission Spectra, Interstellar Matter, Massive Stars, Molecular Clouds, Star Formation, Millimeter Waves, Molecular Flow, Synthetic Apertures

Scientific paper

The 1.3 mm continuum emission and HC3N J = 25 - 24 emission has been observed toward two massive star-forming regions in the core of the Sagittarius B2 molecular cloud. The 1.3 mm continuum data show two compact sources of dense and warm dust. The northern source has a mass of about 9000 solar masses based on the dust continuum emission and a size of about 5 arcsec in the N-S direction. The HC3N interferometric data show the presence of a fast molecular outflow centered within about 1 arcsec of the continuum source and H2O maser center. The axis of the outflow is perpendicular to the extension of the continuum emission, indicating that we may be seeing an inclined dense region which helps to collimate the large-scale outflow. The dynamical mass implied by the observed angular velocity is about 4500 solar. We thus most likely see a flattened, rotating, and collapsing dense part of a GMC core with several young stars forming at its center.

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