Article

Observational and Theoretical Studies of 27 δ Scuti Stars with Investigation of the Period–Luminosity Relation

Atila PoroAstronomy Department of the Raderon Lab., Burnaby, BC, CanadaEhsan PakiThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranGolnaz MazhariThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranSoroush SarabiAstronomy Department of the Raderon Lab., Burnaby, BC, CanadaFiliz Kahraman AlicavusÇanakkale Onsekiz Mart University, Astrophysics Research Center and Ulupınar Observatory, TR-17100, Çanakkale, TurkeyFarzaneh Ahangarani FarahaniThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranHamidreza GuilaniThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranAlexander A. PopovKourovka Astronomical Observatory of Ural Federal University, Ekaterinburg, RussiaAlexandra M. ZubarevaInstitute of Astronomy, Russian Academy of Sciences, Moscow, RussiaBehjat Zarei JalalabadiThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranMahshid NourmohammadThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranFatemeh DavoudiAstronomy Department of the Raderon Lab., Burnaby, BC, CanadaZahra Sabaghpour AraniThe Eighth IOTA/ME Summer School of Astronomy, Tafresh University, Tafresh, IranAmir GhaleeDepartment of Physics, Tafresh University, P.O. Box 39518-79611, Tafresh, Iran

2021en

ABI

Abstract

The multi-color CCD photometric study of 27 δ Scuti stars is presented. By using approximately three years of photometric observations, we obtained the times of maxima and magnitude changes during the observation time interval for each star. The ephemerides of our δ Scuti stars were calculated based on the Markov Chain Monte Carlo (MCMC) method using the observed times of maxima and the period of the stars’ oscillations. We used the Gaia EDR3 parallaxes to calculate the luminosities and also the absolute magnitudes of these δ Scuti stars. The fundamental physical parameters of all the stars in our sample such as masses and radii were estimated. We determined the pulsation modes of the stars based on the pulsation constants. Moreover, the period–luminosity (P–L) relation of δ Scuti stars was investigated and discussed. Then, by using a machine learning classification, new P–L relations for fundamental and overtone modes are presented. © 2021. The Astronomical Society of the Pacific. All rights reserved.

Identifiers

DOI: 10.1088/1538-3873/ac12dc

Citations and references

Cited by 30 references

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