An empirical investigation of mass-loss in OB stars

Details An empirical investigation of mass-loss in OB stars An empirical investigation of mass-loss in OB stars

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..295w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 2, Aug. 1985, p. 295-304.

Astronomy and Astrophysics

Astrophysics

22

B Stars, Mass Flow Rate, O Stars, Stellar Mass Ejection, Stellar Winds, Astronomical Catalogs, Radii, Stellar Luminosity, Supergiant Stars

Scientific paper

The Lamers (1981) data sample of mass loss rates and stellar parameters for OB stars is presently supplemented by Of star data from the Garmany et al. (1981) sample to derive an empirical expression that relates mass loss rate to stellar luminosity, radius, and mass. The ratio of the momentum carried away by the stellar wind to the momentum of the stellar photons is not proportional to terminal velocity; this implies that there must be an additional force acting outside the sonic point, other than that produced by the lines, which has the property of partly compensating for the drop in momentum transferred from the radiation field to the wind envelope due to the line blocking factor decrease with surface gravity.

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