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Frequency Analysis of δ Scuti and RR Lyrae Stars in the OGLE-1 Database

Published online by Cambridge University Press:  12 April 2016

P. Moskalik  and
E. Poretti
P. Moskalik
Affiliation:
Copernicus Astronomical Centre, Warsaw, Poland
E. Poretti
Affiliation:
Copernicus Astronomical Centre, Warsaw, Poland

Abstract

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We discuss the results of a systematic search for multi-periodic pulsations in Galactic Bulge δ Scuti and RR Lyrae stars. Six “normal” double-mode variables pulsating in two radial modes have been identified (5 δ Scuti-type and 1 RR Lyrae-type). In 37 RR Lyrae stars secondary periodicities very close to the primary pulsation frequency have been detected. These periodicities correspond to nonradial modes of oscillation. They are found in ∼ 23% of RRab and in ∼ 3% of RRc variables of our sample.

Type
Part 3. Nonlinear Effects in Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 392 - 395
Copyright
Copyright © Astronomical Society of the Pacific 2002

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