Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001padeu..11...89p&link_type=abstract
Publications of the Astronomy Department of the Eötvös University No. 11, Proceedings of the National Postgraduate Reunion in As
Astronomy and Astrophysics
Astrophysics
Stars: Oscillation, Stars: Variables: Delta Scuti, Stars, Individual: Ae Uma
Scientific paper
Stability of both the fundamental and first overtone oscillations of AE UMa was investigated by different methods which led to concordant results. The reported fast period decrease Hintz proved to be incorrect, the fundamental period of AE UMa has been essentially constant in the past 60 years in accordance with the theoretical expectation Braune. The constancy of the fundamental period suggests that the star is in the post-main sequence evolutionary state in accordance with the evolutionary theories. The first overtone period is definitely decreasing with a rate of (1/P 1) (dP 1/dt)=-7.3*10-8 y-1 . The fact that the rate of period change for two modes is quite different indicates that non-evolutionary effects may also generate period changes.
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