Terminal velocities of the winds from rapidly rotating OB stars

Details Terminal velocities of the winds from rapidly rotating OB stars Terminal velocities of the winds from rapidly rotating OB stars

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353..617f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 20, 1990, p. 617-622.

Physics

5

B Stars, O Stars, Stellar Rotation, Stellar Winds, Terminal Velocity, Ultraviolet Spectra, Absorption Spectra, Carbon, Continuous Radiation, Early Stars, Stellar Physics

Scientific paper

This paper presents measurements of terminal velocities of OB stars which are rapid rotators, based on archival high-dispersion IUE spectra of the C IV resonance doublet. The terminal velocities of the most rapidly rotating stars appear to be systematically lower than those of the less rapidly rotating stars (at least for the cooler stars), although the number of very rapid rotators is only three. The modified line-radiation driven wind model of Friend and Abbott, which takes into account the finite size of the star as well as its rotation, predicts that the terminal velocity should drop with increasing rotational velocity. However, when a smaller but very homogeneous subset of the data is used (BO giants only), the correlation between terminal velocity and rotational velocity disappears.

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