Synthesis maps of millimeter molecular lines

Details Synthesis maps of millimeter molecular lines Synthesis maps of millimeter molecular lines

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982nyasa.395..154w&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

1

Astronomical Maps, Astronomical Spectroscopy, Millimeter Waves, Molecular Spectra, Nebulae, Abundance, Line Spectra, Sulfur Compounds, Sulfur Oxides

Scientific paper

Aperture synthesis maps of the emission of SO at 3.4 mm wavelength in the Kleinmann-Low Nebula Orion, made with an angular resolution of 6 arcsec and a velocity resolution of 0.8 km/s, are presented which reveal a combination of turbulent and systematic motions over a velocity range of at least 50 km/s. A model of these features is presented which shows an expanding, irregular ring of gas seen approximately edge on, the ring being dense material swept up by winds from one or more objects in the Kleinmann-Low Nebula core. Lower resolution observations of HCN, SiO (v = 0), and HCO(+) indicate that HCN and SiO have a substantial component in the ring but that the HCO(+) is very underabundant there. The observed abundance of several sulfur molecules at low resolution is determined to yield a minimum hydrogen mass of 0.4 solar masses and a minimum kinetic energy in the ring of 4 x 10 to the 45th erg. For the more probable mass of 15 solar masses based on excitation considerations, the implied kinetic energy in the gas of the ring is found to be about 1.4 x 10 to the 47th erg.

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