在上一個研究中，我們透過史維基瞬變設備（ZTF）的gr(i)波段光變曲線數據，建立了晚型密接雙星的週期-光度（PL）關係。以上個研究為基礎，我們的新研究旨在探討主星溫度及系統總質量對PL關係殘差的影響。為此，我們使用了ZTF光變曲線、Gaia DR3的視差數據以及WuMaCat中的多項物理參數，針對700個密接雙星樣本進行分析。透過整合這些數據，我們期望能對密接雙星的PL關係獲得更深入的理。我們的研究發現質量比、溫和系統總質量並不會對PL關係有明顯的改善，所以單就軌道週期仍然是預測密接雙星光度最主要的因素。 ;In Ngeow et al. 2021 [6] study, we established a correlation between the periods and luminosity using gr(i)-band light curve data for late-type contact binaries from Zwicky Transient Facility(ZTF). Building on this, our new research aims to investigate how the primary star’s temperature and total system mass influence the residuals of the period-luminosity (PL) relation. To achieve this, we utilized light curve from ZTF, parallax from Gaia DR3 and other indices from WUMaCat for a sample of 700 contact binaries. By integrating these datasets, we anticipate gaining deeper insights into the PL relation for contact binaries. Our analysis shows that mass ratio, temperature, and total mass do not significantly improve the PL relation, suggesting that orbital period alone remains the most robust predictor of luminosity in contact binaries.
