Summary of observations of the star-forming region

Details Summary of observations of the star-forming region Summary of observations of the star-forming region

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982nyasa.395..162z&link_type=abstract

(NASA, National Science Foundation, New York Academy of Sciences, et al., Symposium on the Orion Nebula to Honor Henry Draper, N

Astronomy and Astrophysics

Astronomy

Orion Nebula, Stellar Evolution, Flow Velocity, Hydrogen Clouds, Infrared Astronomy, Milky Way Galaxy, Molecular Clouds, Stellar Winds

Scientific paper

The unique features of Orion revealed by the Becklin-Neugebauer - Kleinmann-Low (BN-KL) infrared cluster are discussed. It is pointed out that in the microwave domain, some of the molecules detected toward BN-KL have been seen nowhere else. Moreover, the methyl alcohol (CH3OH) masers seen toward BN-KL have not been detected anywhere else in the Galaxy. Particular attention is given to the mechanism that drives the energetic high-velocity flows, as well as to the properties of the flow and its interaction with the surrounding molecular cloud. It is believed that stars responsible for the energetic winds are probably almost on the main sequence and are not cocoon stars. With respect to Werner's model, it is noted that the simple geometry is not obviously consistent with the distribution of H2, H2O maser, OH maser, and high-velocity CO and SO emissions that seem to be elongated along various, often orthogonal, axes. If the supposition is made that the emission originates, as least in part, from the wind itself, then, with the exception of the H2 and far-infrared CO emission (which are hot), it is not obvious that shock excitation is required for other molecules observed at millimeter wavelengths.

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