Journal of Physics: Conference Series PAPER • OPEN ACCESS Line Variations of Hα Emissions and Absorptions of Be Stars To cite this article: Aprilia et al 2019 J. Phys.: Conf. Ser. 1127 012043 View the article online for updates and enhancements. This content was downloaded from IP address 172.245.63.226 on 06/02/2019 at 02:50