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The Radial Velocity Curve of V652 Her (BD+13°3224)

Published online by Cambridge University Press:  12 April 2016

P.W. Hill  and
C.S. Jeffery
P.W. Hill
Affiliation:
University Observatory Buchanan Sardens St Andrews Fife KY16 9LZScotland
C.S. Jeffery
Affiliation:
University Observatory Buchanan Sardens St Andrews Fife KY16 9LZScotland

Abstract

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New radial velocity data for the pulsating extreme helium star V652 Her (BD+13°3224) have been obtained with a time resolution of 100 s. High frequency structure in the radial velocity curve is detected, and a comparison with previous data suggests that the detailed shape of the velocity curve is variable. The data imply that the effective surface gravity must increase by a factor of 4 at minimum radius.

Type
III Hot Extreme Helium Stars
Information
International Astronomical Union Colloquium , Volume 87: Hydrogen Deficient Stars and Related Objects , 1985 , pp. 109 - 115
Copyright
Copyright © Reidel 1986

References

Cottrell, P.L. & Lambert, D.L., 1982. Astrophys.J., 261, 595.CrossRefGoogle Scholar
Hill, P.W., Kilkenny, D., Schönberner, D. & Walker, H.J., 1981. Mon.Not.R.astr.Soc., 197, 81, (Paper I).Google Scholar
Hunger, K., 1975. Problems in Stellar Atmospheres and Envelopes, p. 57, eds Baschek, B., Kegel, W.H. & Traving, G., Springer-Verlag, Berlin.CrossRefGoogle Scholar
Jeffery, C.S., 1984. Mon.Not.R.astr.Soc., 210, 731.Google Scholar
Jeffery, C.S., Heber, U. & Hill, P.W., 1986. IAU Colloquium 87.Google Scholar
Jeffery, C.S. & Hill, P.W., 1986. Hon.Not.R.astr.Soc., submitted.Google Scholar
Kilkenny, D., Hill, P.W. & Penfold, J.E., 1981. Mon.Not.R.astr.Soc., 194, 429.Google Scholar
Kilkenny, D. & Lynas-Gray, A.E., 1982. Mon.Not.R.astr.Soc., 198, 873.CrossRefGoogle Scholar
Kilkenny, D. & Lynas-Gray, A.E., 1984. Mon.Not.R.astr.Soc., 208, 673.Google Scholar
Landolt, A.U., 1975. Astrophys.J., 196, 789.Google Scholar
Lynas-Gray, A.E. & Kilkenny, D., 1986. IAU Colloquium 87.Google Scholar
Lynas-Gray, A.E., Schönberner, D., Hill, P.W. & Heber, U., 1984. Mon.Not.R.astr.Soc., 209, 387, (Paper II).Google Scholar
Parsons, S.B., 1972. Astrophys.J., 174, 57.CrossRefGoogle Scholar
Saio, H. & Wheeler, J.C., 1985. Astrophys.J., 295, 38.Google Scholar
Schönberner, D., 1975. Astron.Astrophys., 44, 383.Google Scholar
Willson, L.A., 1976. Astrophys.J., 205, 172.Google Scholar
Wood, P.R., 1976. Mon.Not.R.astr.Soc., 174, 531.Google Scholar