Linear Analysis of Rv-Tauri Stars - the Resonance Hypothesis

Details Linear Analysis of Rv-Tauri Stars - the Resonance Hypothesis Linear Analysis of Rv-Tauri Stars - the Resonance Hypothesis

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271..501t&link_type=abstract

Astronomy and Astrophysics, Vol.271, NO. 2/APR, P. 501, 1993

Astronomy and Astrophysics

Astrophysics

21

Stellar Atmospheres, Stars: Oscillations, Stars: Fundamental Parameters, Stars: Post-Agb, Stars: Rv Tauri

Scientific paper

Models of low mass stars (0.5 Msun < M < 0.8 Msun) with thin envelopes (< 10-2 Msun) and luminosities between 1O3 Lsun and 1O4 Lsun, which probably represent proto planetary nebulae, are found to fit nicely the observed features of RV Tauri variables. The linear nonadiabatic pulsational properties of these models, for an extensive range of initial parameters (masses, luminosities and effective temperatures) are presented. The period of the fundamental mode, in most of these models, turns out to be nearly twice that of the first overtone. This fact raises again (Takeuti & Petersen 1983) the possibility that a simple resonance between the fundamental mode and the first overtone is responsible for the observed, well known, alternating minima in the light curves of RV Tauri stars.

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