CCD Photometry, Period Analysis, Light Curve Deconvolution, and Evolutionary Status of the High Amplitude δ Scuti Variable Star, TYC 3224-2602-1

Volume 52 number 2 (2024)

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W. Allen Gilchrist, Jr.

Stonecrest Observatory, 104 Deer Ridge Drive, Fort Davis, TX 79734; gilchrist.allen@ymail.com

Abstract

CCD-derived photometric magnitude data (B, V, Rc, and Ic) were secured at the Stonecrest Observatory (SO) between 20 September and 18 October 2023 for TYC 3224-2602-1, a pulsating variable star classified as a High Amplitude δ Scuti (HADS) star. These data, along with V magnitudes from the AAVSO International Database (AID) and stellar flux measurements from the Transiting Exoplanet Survey Satellite (TESS) resulted in a total of 277 new times of maxima (ToMx); 215 from the TESS flux measurements, two from the AAVSO archived data, and 60 from the multicolor SO data. All of these were combined in a period analysis to produce an updated linear ephemeris. B–V color indices from the multicolor SO data provided estimates of the effective temperature and other parameters. Discrete Fourier deconvolution of the data revealed a fundamental and two significant harmonics. TYC 3224-2602-1 is most probably a simple radially oscillating HADS star.