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No RV Tauri Stars in Globular Clusters?

Zsoldos E.

Acta Astronomica

1998

Vol. 48, No. 4

775--788

The light curves of six globular cluster stars, the ones usually classified as RV Tauri variables, were investigated in order to check the validity of the classification. Period analysis has shown - as far as the poor quality of data allowed - that these stars do not generally display the formal period in their power spectra, and the ratio of the amplitudes of the existing frequencies is very different from those found in field RV Tauri stars. Their light curves do not support the classification either, i.e., the alternating minima are missing.