We show here that the absorptive Hα polarized line profile previously seen in many Herbig Ae/Be (HAeBe) stars is a nearly ubiquitous feature of other types of embedded or obscured stars. This characteristic 1% linear polarization variation across the absorptive part of the Hα line is seen in Post-AGB stars as well as RV-Tau, δ-Scuti, and other types. Each of these stars shows evidence of obscur...

ABSTRACT The presence of pulsating stars in eclipsing binary systems (EBs) makes these objects significant since they allow us to investigate the stellar interior structure and evolution. Different types could be found EBs, such as δ Scuti variables. EBs have been known for decades, increasing number is important understanding pulsational structure. Hence, this study, research was carried out o...

The NASA Kepler and follow-on K2 missions (2009-2018) left a legacy of data discoveries, finding thousands exoplanets, also obtaining high-precision long time-series for hundreds stars, including many types pulsating variables. Here we highlight few the ongoing discoveries from on $\delta$ Scuti variables, which are core hydrogen-burning stars about twice mass Sun. We discuss unsolved problems ...