Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303l..61w&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 303, April 15, 1986, p. L61-L65. Research supported
Astronomy and Astrophysics
Astrophysics
16
Pre-Main Sequence Stars, Stellar Envelopes, Stellar Mass Ejection, Stellar Spectra, Continuous Radiation, Cosmic Dust, Line Spectra, Radio Spectra, Stellar Winds
Scientific paper
High-resolution continuum and molecular-line observations of the circumstellar environment of the emission-line star LkH-alpha 234 are presented. These observations have revealed a compact continuum source at 15, 23, and 98 GHz coincident with the star and a 10,000 by 17,000 A.U. ridge of CS J = 2 to 1 emission which peaks about 4 arcsec east of the star. The spectral dependence for the radio continuum emission of v exp 1.6 is most easily interpreted as arising from a partially ionized stellar wind. The inferred mass loss rate from a spherically symmetric wind is 2 x 10 to the -6th solar mass/yr or more which is comparable to the time average mass-loss rate derived from the larger scale molecular outflow. A model which describes the properties of teh CS emission in terms of a rotating molecular disk which would link LkH-alpha 234 with large-scale mass-loss activity in the cloud has many attractive features.
Mundy Lee G.
Schwartz Richard D.
Wilking Bruce A.
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