Period-Luminosity Relationship for δ Scuti Stars Revisited

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外文摘要：The Gaia DR3 parallax approach was used to estimate the absolute parameters of 2375 δ Scuti stars from the ASAS catalog.The selected stars have a variety of observational characteristics,with a higher than 80％probability of being δ Scuti stars.We have displayed all the stars in the Hertzsprung-Russell diagram along with the δ Scuti instability strip,the Zero Age Main Sequence and the Terminal Age Main Sequence.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 leaming methods,which showed that surface gravity and temperature have the greatest effect on its calculation.The Period-Luminosity(P-L)relationship of the δ 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.

外文关键词：

stars:variables:delta Scutistars:fundamental parametersmethods:data analysis

作者：

Atila Poro、S.Javad Jafarzadeh、Roghaye Harzandjadidi、Mohammad Madani、Elnaz Bozorgzadeh、Esfandiar Jahangiri、Ahmad Sarostad、Ailar Alizadehsabegh、Maryam Hadizadeh、Mohammad EsmaeiliVakilabadi

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作者单位：

The Raderon AI Laboratory,Astronomy Department,Burnaby,BC,Canada

Department of Physics,University of Texas at Dallas,800 W.Campbell Rd.,Richardson,TX 75080,USA

Department of Theoretical Physics and Astrophysics,University of Zanjan,Zanjan,Iran

Independent researcher,Tehran,Iran

Department of Electronics and Telecommunications,Politecnico Di Torino,Turin,Italy

Independent researcher,Isfahan,Iran

Yazd Desert Night Sky Astronomy Institute,Yazd,Iran

Department of Photonics,Tabriz University,Tabriz,Iran

Khayyam Astronomy Association,Fars,Fasa,Iran

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出版年：

2024

DOI：

10.1088/1674-4527/ad1b0f

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(2)

参考文献量33