It is important to understand stellar evolution as well as the chemical composition and structure of the Galactic disk, in which B stars in open clusters play a major role as they are of the most massive and brightest objects in these clusters. The fundamental atmospheric parameters (Teff, log g) of the B stars in the Alpha Persei open cluster (190pc, 50Myrs) have been determined using the Stromgren uvby-β photometric system, with a calibration technique by Napiwotzki et al. (1993)[65]. The method is based on fitting spectral lines of fundamental stars to synthetic spectra based on Kurucz ...

This study is part of a newly growing science in exoplanet characteristics. We present an initial attempt to investigate the relationship between the eclipse depth of giant exoplanets and the metallicity of their host stars to show the best eclipse depth-metallicity trend. This will help us to better understand the conditions that lead to giant planets formation, which helps to postulate about the formation of our Solar System and more generally the planet formation theories. Previous studies have shown that stars with giant planets tend to have higher metallicities than stars without giant ...