Centimeter and millimeter recombination lines from W 3(OH) - Expansion or champagne flow?

Details Centimeter and millimeter recombination lines from W 3(OH) - Expansion or champagne flow? Centimeter and millimeter recombination lines from W 3(OH) - Expansion or champagne flow?

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...186l...5w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 186, no. 1-2, Nov. 1987, p. L5-L8.

Astronomy and Astrophysics

Astrophysics

11

Centimeter Waves, Line Spectra, Millimeter Waves, Recombination Reactions, Star Formation, Stellar Mass Ejection, Continuous Spectra, Molecular Clouds, Optical Thickness, Radial Velocity, Stellar Models, Thermodynamic Equilibrium

Scientific paper

The continuum and recombination line data presented confirm the sense of the radial velocity change reported by Berulis and Ershov (1983). The radial velocity becomes about 5 km/sec more positive between 2-cm and 2-mm wavelengths; this is consistent with a combination of expansion, optical depth, and non-LTE effects. Al alternative explanation involves 'champagne flow' off dense neutral regions, in conjunction with different optical depths in the ionized gas. The data available do not permit a definitive choice between the two models.

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