The Long-Term H$α$ Emission Line Variation in $α$ Eri

Details The Long-Term H$α$ Emission Line Variation in $α$ Eri The Long-Term H$α$ Emission Line Variation in $α$ Eri

2005-09-07

arxiv.org/abs/astro-ph/0509180v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

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$\alpha$ line emission increases from zero to its maximum, agree with the viscous decretion model. On the other hand, the time required for the disc dissipation ranges from 6 to 12 years which questions the viscous disc model predictions.

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