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Ry Sgr: Pulsation Related Phenomenon

Published online by Cambridge University Press:  12 April 2016

W.A. Lawson
W.A. Lawson*
Affiliation:
Mount John University ObservatoryDept. of Physics, Univ. of CanterburyChristchurchNew Zealand

Extract

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The absorption line splitting reported by Cottrell and Lambert has been shown to be associated with the semi-regular pulsations. The event has a time scale of about 10 days (0.23 of a period) occuring about the radial velocity reversal at minimum radius. The velocity reversal is more rapid than indicated in an earlier radial velocity analysis by Alexander et al. There is evidence that the phase of the line splitting event is similar to the phase of the onset of the obscurational light declines.

Type
IV Cool Hydrogen Deficient Stars
Information
International Astronomical Union Colloquium , Volume 87: Hydrogen Deficient Stars and Related Objects , 1985 , pp. 211 - 215
Copyright
Copyright © Reidel 1986

References

Alexander, J.B., Andrews, P.J., Catchpole, R.M., Feast, M.W., Lloyd Evans, T., Menzies, J.W., Wisse, P.N.J. & Wisse, M., 1972. M.N.R.A.S., 158, 305.Google Scholar
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Lawson, W.A., 1985, thesis, Univ. of Canterbury.Google Scholar
Pugach, A.F., 1977, Info. Bull. Variable Stars, No. 1277.Google Scholar
Saio, H. and Wheeler, J.C., 1985, Ap. J., 295, 38.Google Scholar