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The Parallaxes of U Gem Variables

Published online by Cambridge University Press:  12 April 2016

Karl W. Kamper*
Affiliation:
David Dunlap Observatory, University of Toronto

Extract

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An Allegheny parallax series of SS Cyg, consisting of 52 exposures obtained on 15 nights, was recently measured on the PDS microphotometer at the David Dunlap Observatory, and a value of (m.e.) derived for the absolute parallax. This is close to the mean of the two previous discordant measures for this star given in the table below. The weighted mean of the three determinations implies that the absolute magnitude, at quiescent phase, of the star is between 7.0 and 9.0 formally at a 90% confidence level. Recent parallax determinations made at Lick by Vasilevskls et al. (1975) for three other stars, listed below along with the Mt. Wilson value for U Gem, imply even fainter absolute magnitudes.

Type
Abstracts of Workshop Papers on Dwarf Novae
Copyright
Copyright © The University of Rochester 1979

References

Kraft, R.P. and Luyten, W.J. 1965, Astrophys. J., 142, 1041.Google Scholar
Vasilevskls, S., Harlan, E.A., Klemola, A.R., and Wirtanen, C.A. 1975, Publ. Lick Obs., 23, part VGoogle Scholar