Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...92..145y&link_type=abstract
The Astrophysical Journal Supplement Series, vol. 92, no. 1, p. 145-161
Astronomy and Astrophysics
Astronomy
66
Astronomical Maps, Carbon Monoxide, Ejecta, Globules, Interstellar Matter, Line Spectra, Mapping, Molecular Clouds, Radio Astronomy, Radio Spectra, Star Formation, Stellar Evolution, Stellar Mass Ejection, Antennas, Astronomical Spectroscopy, Data Integration, Microwave Spectrometers, Stellar Envelopes
Scientific paper
We have obtained (12)CO J = 1-0 spectral line maps of high-velocity gas outflows from a sample of 14 small Bok globules containing low-mass young stellar objects (YSOs). The observations were performed using the new 15 beam receiver (QUARRY) of the Five College Radio Astronomy Observatory. Morphologically, the outflows in our sample exhibit small angular extents, and relatively wide angular lobes with the majority exhibiting low apparent degrees of collimation. The presence of an outflow was found to be correlated with the value of the Infrared Astronomical Satellite (IRAS)- based spectral index (between 12 and 25 micrometers) of the YSOs. Outflows were more frequently detected in those globules with the reddest IRAS point sources. These spectral indices are consistent with emission from objects in fairly early stages of the star formation process which are still deeply embedded in gas and dust. Energetically, the outflows in our sample may be among the weakest and least massive found to date. Nevertheless, both the outflow kinematics and energetics indicate that they may play an important role in cloud support and evolution.
Clemens Dan P.
Yun Joao Lin
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