Solar-like oscillations in semiregular variables

Details Solar-like oscillations in semiregular variables Solar-like oscillations in semiregular variables

2002-09-18

arxiv.org/abs/astro-ph/0209358v2

Astrophys.Space Sci. 284 (2003) 61-64

Astronomy and Astrophysics

Astrophysics

To appear in "Asteroseismology Across the HR Diagram" (Porto, July 2002), Eds. Thompson M.J., Cunha M.S. and Monteiro M.J.P.F.

Scientific paper

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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