The Stability of Cepheid Pulsations

Details The Stability of Cepheid Pulsations The Stability of Cepheid Pulsations

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001oap....14..170t&link_type=abstract

Odessa Astronomical Publications, 14, 170-173

Astronomy and Astrophysics

Astronomy

14

Stars: Variable: Pulsating: Cepheids

Scientific paper

Analyses of Cepheid period changes using O-C diagrams are used to establish the direction of evolution of individual stars through the instability strip. The superposition of random fluctuations in period on O-C data is less easy to interpret. Such chaotic behavior is a standard feature of Mira and RV Tauri variables according to the work of Percy, but has not been examined in detail for Cepheids. Unlike the situation for cooler classes of pulsators, most Cepheids do not exhibit random fluctuations in period. Binarity plays only a minor role in the scatter in O-C data.

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