Studies of Cepheid type variability. VIII - Period ratios of RR Lyrae stars

Details Studies of Cepheid type variability. VIII - Period ratios of RR Lyrae stars Studies of Cepheid type variability. VIII - Period ratios of RR Lyrae stars

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...243..426p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 243, no. 2, March 1991, p. 426-428.

Physics

10

Blue Stars, Cepheid Variables, Globular Clusters, Stellar Oscillations, Stellar Physics, Metallicity, Stellar Luminosity, Stellar Mass

Scientific paper

The accuracy of determination of RR Lyrae masses from observed period ratios is studied with a view toward recent controversies about physical properties of globular cluster stars. It is shown that the application of one standard calibration diagram of constant mass curves is insufficient to take changes in metal content between Oosterhoff I and II clusters and possible luminosity differences into account. It is concluded that correct application of period ratios is more complicated than generally assumed at present. In due time observed period ratios will provide a sensitive test of horizontal branch models.

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