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Oscillatory convective modes in red giants: A possible explanation of the long secondary periods

Saio, H; Wood, Peter R; Takayama, Kazuyoshi; Ita, Yoshifusa


We discuss properties of oscillatory convective modes in low-mass red giants, and compare them with observed properties of the long secondary periods (LSPs) of semiregular red giant variables. Oscillatory convective modes are very non-adiabatic g− modes and they are present in luminous stars, such as red giants with log L/L⊙ ≳ 3. Finite amplitudes for these modes are confined to the outermost non-adiabatic layers, where the radiative energy flux is more important than the convective energy...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stv1587


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