Date of Graduation

Spring 2025

Degree

Master of Natural and Applied Science in Physics

Department

Physics, Astronomy, and Materials Science

Committee Chair

Andrzej Baran

Abstract

This study presents a photometric and spectroscopic classification of 43 variable stars observed across multiple TESS sectors. By combining high-precision light curves with ground-based spectroscopic data, we explore the variability patterns, pulsation characteristics, and stellar properties of each target. While the sample includes a diverse range of variable star types, a substantial number exhibit behavior consistent with Delta Scuti and Gamma Doradus variability, including rapid pressure-mode and gravity-mode oscillations. Using Fourier analysis, asymptotic spacing detection, and rotational splitting patterns, we identify and characterize pulsation modes, supported by spectral line diagnostics and absorption feature identification. This classification effort not only refines the variable star types within the sample but also contributes to a deeper understanding of pulsators and the broader population of intermediate-mass, short-period and long-period variable stars.

Keywords

stellar spectroscopy, photometry, astrometry, asteroseismology

Subject Categories

Data Science | Stars, Interstellar Medium and the Galaxy

Copyright

© Jonah Vercher

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Available for download on Monday, May 01, 2028

Open Access

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