Paper:	Chemical Abundance Trends Among RV Tauri Stars
Volume:	135, A Half Century of Stellar Pulsation Interpretations: a Tribute to Arthur N. Cox
Page:	34
Authors:	Gonzalez, G.; Lambert, D. L.
Abstract:	We have obtained high resolution spectra of 9 field and 3 globular cluster RV Tau stars. Employing LTE abundance analyses, we have discovered that the chemical abundances of the photospheres of the field RV Tau stars correlate with condensation temperature. The globular cluster RV Tau stars do not display this pattern (except possibly V1 in Omega Cen), but instead display the products of CNO cycling in their photospheres. We discuss possible u sources of these trends.

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