Empirical ionization fractions in the winds and the determination of mass-loss rates for early-type stars

Details Empirical ionization fractions in the winds and the determination of mass-loss rates for early-type stars Empirical ionization fractions in the winds and the determination of mass-loss rates for early-type stars

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242l..33l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 242, Nov. 15, 1980, p. L33-L36.

Astronomy and Astrophysics

Astrophysics

20

Early Stars, Stellar Mass Ejection, Stellar Winds, Ultraviolet Spectra, Abundance, B Stars, Curve Fitting, Fractions, Ion Density (Concentration), Ionization, Mass Flow Rate, O Stars, Plasma Density, Stellar Luminosity

Scientific paper

From a study of the UV lines in the spectra of 25 stars from 04 to B1, the empirical relations between the mean density in the wind and the ionization fractions of O VI, N V, Si IV, and the excited C III (2p 3P0) level were derived. Using these empirical relations, a simple relation was derived between the mass-loss rate and the column density of any of these four ions. This relation can be used for a simple determination of the mass-loss rate from O4 to B1 stars.

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