Evolution of the circumstellar disc of alpha eri
Jan, 2006
3 pages
Published in:
- ASP Conf.Ser. 361 (2007) 521
Contribution to:
e-Print:
- astro-ph/0601070 [astro-ph]
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Abstract: (arXiv)
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 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.References(4)
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