Spectroscopic Sleuthing: Unmasking Chemically Peculiar δ Scuti Stars
Kahraman Alıçavuş and colleagues analyzed ten δ Scuti stars previously labeled as chemically peculiar using high-resolution spectra and TESS data. Only three, AU Scl and FG Eri (Am stars) and HZ Vel (λ Bootis), were confirmed as peculiar, with the rest chemically normal. Their results highlight the need for detailed spectroscopic analysis and show that chemically peculiar A stars can still pulsate like δ Scuti stars, offering valuable tests for stellar evolution theories.
Unraveling the Secrets of δ Scuti Stars: A Journey with TESS Data
The study analyzed four δ Scuti stars using TESS and Gaia DR3 data, identifying their pulsation modes and physical properties. Two stars pulsate in the fundamental mode, while the others in the first overtone. All were classified as Low Amplitude δ Scuti Stars. The findings enhance our understanding of these variable stars and their position on the Hertzsprung-Russell diagram.