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Rotational Studies of Lower Main Sequence Stars

Published online by Cambridge University Press:  30 March 2016

Myron A. Smith
Myron A. Smith*
Affiliation:
Department of Astronomy, University of Texasat Austin

Extract

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This review summarizes the techniques and limitations involved in determining small rotational velocities in late-type stars. Recent results from photoelectric line profiles of field main sequence G stars will also be presented.

Historically three techniques have been used to measure stellar rotational velocities: (1.) calibration of a “clean” line width in terms of computed profile models, (2.) use of the Fourier transform frequency domain (dissection of rotation and turbulent velocity fields from the thermal profile), and (3.) monitoring of the rotational modulation of a chromospherically active or spotted star. The results discussed below concern technique (2.). Technique (3.) has not been exploited much yet but holds considerable promise for the future, in particular for the measurement of ultra-slow rotation.

Type
Joint Commission Meetings
Information
Highlights of Astronomy , Volume 5: Highlights of Astronomy. As presented at the XVIIth General Assembly of the IAU, 1979 , 1980 , pp. 827 - 830
Copyright
Copyright © Cambridge University Press 1980

References

Anderson, C.M., Schiffer, F.H., and Bopp, B.W. 1977, Ap. J., 216, 42.Google Scholar
Basri, G.S., and Linsky, J.L. 1980, Ap. J., in press.Google Scholar
Blanco, C., Catalano, S., Marilli, E., and Rodono, M. 1974, Astr. Ap., 33, 257.Google Scholar
Deutsch, A.J. 1970, I.A.U. Symp. No. 36, (ed. Houziaux, L. and Butler, H.E.), Springer-Verlag: New York, p. 199.Google Scholar
Dicke, R.H. 1972, Ap. J., 171, 331.CrossRefGoogle Scholar
Gray, D.F. 1976, The Observation and Analysis of Stellar Photospheres, Wiley and Sons: New York.Google Scholar
Gray, D.F. 1977, Ap. J., 218, 530.Google Scholar
Gray, D.F., and Martin, B.E. 1979, Ap. J., 231, 139.Google Scholar
Skumanich, A. 1972, Ap. J., 171, 565.Google Scholar
Smith, M.A. 1978, Ap. J., 224, 584 (“S78”).Google Scholar
Smith,\M.A., , and Dominy, J.F. 1979, Ap. J., 231, 477 (“SD79”).CrossRefGoogle Scholar
Vogt, S.S., and Fekel, F. 1979, Ap. J., in press.Google Scholar
Wilson, O.C. 1978, Ap. J., 226, 379.Google Scholar