Variability of HADS stars in TESS

Krzysztof Kotysz

The TESS satellite provides superb-quality light curves for many variable stars. Among them there are high-amplitude δ Scuti stars (HADS) which pulsate mainly in radial modes with periods of the order of 1–3 hours. I will present the results of the analysis of TESS light curves for a sample of about 30 HADS stars from sectors 1–4. The pulsational behaviour of the sample will be characterized by means of the parameters of the Fourier decomposition and period ratios (Petersen diagram). The occurrence of non-radial modes and high radial overtones in HADS stars will be also discussed.

Proceedings of the Polish Astronomical Society, vol. 10, 180-182 (2020)

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