Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330..897l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 15, 1988, p. 897-910. Research supported by the University of Tex
Astronomy and Astrophysics
Astrophysics
139
Interstellar Matter, Pre-Main Sequence Stars, Stellar Mass Ejection, H Alpha Line, Hertzsprung-Russell Diagram, Planetary Evolution, Star Formation, Stellar Luminosity, Stellar Mass, T Tauri Stars
Scientific paper
Molecular outflows are used here to probe mass loss in premain sequence (PMS) stars. Mass-loss rates are determined for 26 objects ranging in luminosity from four to about 100,000 solar, in mass from 0.5 to 30 solar, and in age from about 10,000 to about a million years. The derived mass-loss rates range from 9 x 10 to the -9th to 9 x 10 to the -4th solar mass/yr, with a typical value of 3 x 10 to the -7th solar mass/yr. PMS objects showing mass loss fall in a clearly demarcated region of the H-R diagram. The mass loss is proportional to bolometric luminosity to the 0.6 power and to stellar mass to the 1.8 power. The implications of these findings for the nature of the PMS mass-loss mechanism, for self-regulated low-mass star formation, and for planetary formation are discussed.
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