The Long-Term H$\alpha$ Emission Line Variation in $\alpha$ Eri

M. M. F. Vinicius, Nelson Vani Leister, Juan Zorec +1

The long-term variation of the H$\alpha$ line in $\alpha$ Eri has 14-15 years cyclic \bbe phase transitions. The disc formation time scales, interpreted as the periods during which the H$\alpha$…