The Gaia DR3 parallax approach was used to estimate the absolute parameters of 2375 Delta Scuti stars from the ASAS catalog. The selected stars have a variety of observational characteristics, with a higher than 80% probability of being Delta Scuti stars. We have displayed all the stars in the Hertzsprung-Russell (H-R) diagram along with the Delta Scuti instability strip, the Zero Age Main Sequence (ZAMS), and the Terminal-Age Main Sequence (TAMS). Then, we determined which fundamental and overtone modes each star belongs to using pulsation constant (Q) calculations. In addition, we evaluated the parameters in the Q calculation equation using three machine learning methods, which showed that surface gravity and temperature have the greatest effect on its calculation. The Period-Luminosity (P-L) relationship of the Delta Scuti stars was also revisited. Eventually, using least squares linear regression, we made four linear fits for fundamental and overtone modes and updated their relationships.
@article{arxiv.2401.01091,
title = {Period-Luminosity Relationship for $\delta$ Scuti Stars Revisited},
author = {Atila Poro and S. Javad Jafarzadeh and Roghaye Harzandjadidi and Mohammad Madani and Elnaz Bozorgzadeh and Esfandiar Jahangiri and Ahmad Sarostad and Ailar Alizadehsabegh and Maryam Hadizadeh and Mohammad EsmaeiliVakilabadi},
journal= {arXiv preprint arXiv:2401.01091},
year = {2024}
}
Comments
Accepted by the Research in Astronomy and Astrophysics (RAA) journal