Period–Luminosity Relationship forδScuti Stars Revisited  

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

机构地区：[1]The Raderon AI Laboratory,Astronomy Department,Burnaby,BC,Canada [2]Department of Physics,University of Texas at Dallas,800 W.Campbell Rd.,Richardson,TX 75080,USA [3]Department of Theoretical Physics and Astrophysics,University of Zanjan,Zanjan,Iran [4]Independent researcher,Tehran,Iran [5]Department of Electronics and Telecommunications,Politecnico Di Torino,Turin,Italy [6]Independent researcher,Isfahan,Iran [7]Yazd Desert Night Sky Astronomy Institute,Yazd,Iran [8]Department of Photonics,Tabriz University,Tabriz,Iran [9]Khayyam Astronomy Association,Fars,Fasa,Iran

出　　处：《Research in Astronomy and Astrophysics》2024年第2期138-143,共6页天文和天体物理学研究（英文版）

摘　　要：The Gaia DR3 parallax approach was used to estimate the absolute parameters of 2375δScuti stars from the ASAS catalog.The selected stars have a variety of observational characteristics,with a higher than 80%probability of beingδScuti stars.We have displayed all the stars in the Hertzsprung-Russell diagram along with theδScuti 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 learning methods,which showed that surface gravity and temperature have the greatest effect on its calculation.The Period-Luminosity(P-L)relationship of theδScuti stars was also revisited.Eventually,using least squares linear regression,we made four linear fits for fundamental and overtone modes and updated their relationships.

关 键 词：STARS VARIABLES delta Scuti--stars fundamental parameters-methods data analysis 

分 类 号：P152[天文地球—天文学]