Deneb's variability: a hint of a deep-lying convection zone?
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Author / Producer
Date
2009-04
Publication Type
Journal Article
ETH Bibliography
yes
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Abstract
During their post - main-sequence evolution, massive star models harbor a convection zone on top of their hydrogen burning shell. This physical property helps, under suitable circumstances, to destabilize low-degree nonradial modes that might explain the cyclic light variability of $\alpha $ Cygni variables. The results of first exploratory computations demonstrate that modes with periods ranging from about one dozen to several dozen days can be overstable in star models at about the position on the HR diagram where the prototype of the class, Deneb, is observed.
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Publication status
published
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Book title
Journal / series
Volume
498 (1)
Pages / Article No.
273 - 279
Publisher
EDP Sciences
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Stars: supergiants; Stars: oscillations; Stars: evolution
Organisational unit
00060 - Abt. ETH-Bibliothek / ETH-Bibliothek