Journal Article

Fitting Blazhko light curves

B. Szeidl, J. Jurcsik, Á. Sódor, G. Hajdu and P. Smitola

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 424, issue 4, pages 3094-3100
Published in print August 2012 | ISSN: 0035-8711
Published online August 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.21461.x
Fitting Blazhko light curves

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Abstract

The correct amplitude and phase modulation formalism of the Blazhko modulation is given. The harmonic order dependent amplitude and phase modulation form is equivalent to the Fourier decomposition of multiplets. The amplitude and phase modulation formalism used in electronic transmission technique as introduced by Benkő, Szabó & Paparó for Blazhko stars oversimplifies the amplitude and phase modulation functions; thus, it does not describe the light variation in full detail.

The results of the different formalisms are compared and documented by fitting the light curve of a real Blazhko star, CM UMa.

Keywords: methods: data analysis; techniques: photometric; stars: horizontal branch; stars: individual: CM UMa; stars: oscillations; stars: variables: RR Lyrae

Journal Article.  4844 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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