Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...263..239s&link_type=abstract
Astrophysical Journal, Part 1, vol. 263, Dec. 1, 1982, p. 239-251. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
163
Angular Momentum, Late Stars, Radial Velocity, Stellar Models, Stellar Rotation, Atmospheric Turbulence, Solar Rotation, Stellar Atmospheres, Stellar Spectra
Scientific paper
The present investigation has the objective to obtain good rotational velocities for a large sample of solar-type stars, primarily for the purpose of discussing angular momentum loss. A demonstration is provided of the technique of line profile modeling, and the factors which contribute to uncertainty at small v sin i's are examined. The excellent fits which can be made to solar data using simple models indicate that systematic errors associated with the line modeling process are negligible. Such fits to the sun are essential for ensuring reliable results for slow rotators. The technique of profile modeling can discern differences in v sin i of less than 0.3 km/s for stars rotating as slowly as the sun if the data are of very high quality.
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