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Evolution of the circumstellar disc of alpha Eri

M. M. F. Vinicius·N. V. Leister·J. Zorec·R. S. Levenhagen
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Abstract

The Halpha line emission formation region in the circumstellar disc of alpha Eri is: a) extended with a steep outward matter density decline during low H$α$ emission phases; b) less extended with rather constant density distribution during the strong Halpha emission. The long-term variation of the Halpha emission has a 14-15 year cyclic B-Be phase transition. The disc formation time scales agree with the viscous decretion model. The time required for the disc dissipation is longer than expected from the viscous disc model.

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M. M. F. Vinicius, N. V. Leister, J. Zorec, R. S. Levenhagen. 2006-01-04. Evolution of the circumstellar disc of alpha Eri. https://arxiv.org/abs/astro-ph/0601070

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