Analysis of the possible Blazhko-effect Cepheid V473 Lyrae
L. Moln\'ar, L. Szabados, R. J. Dukes, Jr., \'A. Gy\H{o}rffy, R., Szab\'o
TL;DR
This paper investigates V473 Lyrae, a Cepheid star exhibiting Blazhko-like amplitude and phase modulations with a period of about 1204 days, revealing complex variability and spectral features.
Contribution
It provides the first detailed analysis of V473 Lyrae's modulation cycles, identifying amplitude, phase variations, and spectral components.
Findings
Amplitude and phase modulations with ~1204-day period
Cycle length and modulation strength vary significantly
Detection of a possible quintuplet Fourier component
Abstract
V473 Lyrae is a peculiar Galactic Cepheid, showing strong amplitude modulation that resembles the Blazhko-effect observed in RR Lyrae stars. We collected data spanning several modulation cycles and started a detailed analysis. The first results indicate that the star shows both amplitude and phase modulations with an average period of 1204 days, but both the cycle length and the strength of the modulation are subjected to considerable variations. A possible quintuplet component in the Fourier spectrum and additional period changes were also detected.
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