Studies on amplitude modulated RR Lyrae stars. II. RS Bootis

Details Studies on amplitude modulated RR Lyrae stars. II. RS Bootis Studies on amplitude modulated RR Lyrae stars. II. RS Bootis

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...339..440n&link_type=abstract

Astronomy and Astrophysics, v.339, p.440-448 (1998)

Astronomy and Astrophysics

Astrophysics

22

Stars: Individual: Rs Boo, Stars: Variables: Rr Lyrae, Stars: Oscillations

Scientific paper

All photographic and photoelectric observations of RS Boo since 1938 have been analysed in order to obtain an accurate mathematical description of the light variation. A Fourier sum with frequencies f0, fm, kf0, kf0+/- fm, where k = 1, 2, ... , 11; f_0 = 2.6501491 d(-1) ; fm = 0.001886 d(-1) and a linear period change of the f_0 and the kf_0 components with beta = 7.0x 10(-11) give a fit with a standard deviation of sigma = 0.064 mag. Considering the various quality and the long span of the data, this level of accuracy can be regarded as a good one. In contrast with some reports about the existence of a secondary modulation we have not found any sign of this component in the prewhitened spectrum.

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