Abstract
Power spectra of the light curves of semiregular variables, based on visual magnitude estimates spanning many decades, show clear evidence for stochastic excitation. This supports the suggestion by Christensen-Dalsgaard et al. (2001) that oscillations in these stars are solar-like, i.e., stochastically excited by convection, with mode lifetimes ranging from years to decades.
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Bedding, T.R. (2003). Solar-Like Oscillations in Semiregular Variables. In: Thompson, M.J., Cunha, M.S., Monteiro, M.J.P.F.G. (eds) Asteroseismology Across the HR Diagram. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0799-2_9
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DOI: https://doi.org/10.1007/978-94-017-0799-2_9
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