TESS data mining and UVES espectral analysis of CP star

TL;DR

This study combines TESS photometry and UVES spectral analysis to refine the stellar parameters and understand the atmosphere and variability of the chemically peculiar star HD 72968.

Contribution

It introduces a comprehensive approach integrating photometric and spectroscopic data for detailed stellar analysis of a CP star.

Findings

Confirmed the orbital period of HD 72968 as 11.307 days.

Refined the effective temperature estimate of HD 72968.

Validated stellar models through spectral energy distribution analysis.

Abstract

Photometric data from TESS were analyzed to obtain the light curve, confirming that the orbital period (P = 11.307 $\pm$ 0.005 days) remains constant. A wavelet analysis was applied to detect temporal anomalies. The photometric effective temperature of HD 72968 was estimated through colorimetry, comparing it with main-sequence stars. UVES spectra were analyzed, Doppler-corrected, and normalized using Chebyshev functions. A theoretical spectral grid generated with SPECTRUM and ATLAS9 was fitted using the chi-squared method. A comparison with UVES-ESO spectra refined the temperature estimate of HD 72968. The analysis of the spectral energy distribution (SED) enabled the derivation of stellar parameters, validating the models employed. These results provide new insights into the atmosphere and variability of HD 72968 and motivate further spectral studies for improved stellar modeling.