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Title:
Observational evidence against differential rotation in F stars
Authors:
Gray, D. F.
Affiliation:
AA(Western Ontario, University, London, Canada)
Publication:
Astrophysical Journal, Part 1, vol. 258, July 1, 1982, p. 201-208. Research supported by the Natural Sciences and Engineering Research Council of Canada. (ApJ Homepage)
Publication Date:
07/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
F STARS, LINE SPECTRA, MAIN SEQUENCE STARS, STELLAR ENVELOPES, STELLAR ROTATION, STELLAR SPECTRA, FOURIER TRANSFORMATION, LINE SHAPE, STELLAR MODELS
Comment:
A&AA ID. AAA031.116.056
DOI:
10.1086/160068
Bibliographic Code:
1982ApJ...258..201G

Abstract

The interaction of stellar rotation with a convective envelope is expected to produce a differential effect in the surface rotation. The sun is the one example of the effect, and for it, the equator rotates 15%-20% faster than do higher latitudes. Such an effect has never been detected in other stars. An investigation is conducted of F stars, taking into account careful measurements of spectral line shapes which, in certain cases, are expected to reflect the characteristics of differential rotation. It is found that the evidence in the line profiles of F stars near or on the main sequence is strongly against the expected differential rotation. In fact, the differential rotation in these stars is apparently very much less than in the sun.

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