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Fourier Decomposition Parameters for the Halo RR Lyrae Variables U and V Caeli

Published online by Cambridge University Press:  12 April 2016

L. Hansen  and
J. O. Petersen
L. Hansen
Affiliation:
Copenhagen University Observatory, Øster Voldgade 3, DK-1350 Copenhagen K, Denmark
J. O. Petersen
Affiliation:
Copenhagen University Observatory, Øster Voldgade 3, DK-1350 Copenhagen K, Denmark

Abstract

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UBVRI light curves are obtained for the two halo RR Lyrae variables U Caeli with period 0.420 days (73 observations) and V Caeli with period 0.571 days (42 observations). It is shown that their light curve characteristics are very similar to those of field RR Lyrae stars.

Fourier decompositions are studied for all five magnitudes and the resulting amplitude ratios and phase differences are discussed. The differences in the Fourier decomposition parameters between the five magnitudes are shown to be relatively small. Comparisons of the Fourier decomposition parameters for the two halo RR Lyrae stars with recently published data for field RR Lyrae stars show no systematic differences.

Type
Part IV. Population II Cepheids
Information
International Astronomical Union Colloquium , Volume 82: Cepheids: Theory and Observations , 1985 , pp. 272 - 275
Copyright
Copyright © Cambridge University Press 1985

References

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