The Nature of the Period Changes in RV Tauri Stars

The Nature of the Period Changes in RV Tauri Stars

We have studied the period changes in 15 RV Tauri stars, using the Eddington-Plakidis hypothesis, which assumes that the (O— C) diagrams can be interpreted as a superposition of random errors in the measured times of minimum, and random cycle-to-cycle fluctuations in the period. Except for three sta...

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Veröffentlicht in:Publications of the Astronomical Society of the Pacific 1997-03, Vol.109 (733), p.264-269
Hauptverfasser: Percy, John R., Bezuhly, Michael, Milanowski, Monica, Zsoldos, Endre
Format: Artikel
Sprache:eng
Schlagworte:
Astronomical magnitude
Correlations
Light curves
Mathematical minima
Modeling
RV Tauri variables
Slope of a line
Stars
Stellar evolution
Variable stars
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Zusammenfassung:We have studied the period changes in 15 RV Tauri stars, using the Eddington-Plakidis hypothesis, which assumes that the (O— C) diagrams can be interpreted as a superposition of random errors in the measured times of minimum, and random cycle-to-cycle fluctuations in the period. Except for three stars for which the data are sparse, the hypothesis fits the (O-C) data very well, suggesting that the assumptions are correct. The magnitude of the random period fluctuations does not appear to correlate with any obvious physical property of the stars.
ISSN:0004-6280
1538-3873
DOI:10.1086/133883