Physics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..643c&link_type=abstract
In ESA, Seismology of the Sun and Sun-Like Stars p 643-647 (SEE N89-25819 19-92)
Physics
2
Late Stars, P Waves, Spectrum Analysis, Stellar Evolution, Stellar Oscillations, Amplitudes, Pulses, Stellar Mass, Stellar Models
Scientific paper
The minimum mass star that can exhibit solar-like nonradial p-mode oscillations was investigated. Solar models have almost equal pulsational driving and damping due to standard radiative effects. Coupling with surface convective elements occasionally tips the balance by strongly driving for a few days modes with convection timescales at the top of the convection zone. Then both convective and radiative damping decrease the mode amplitude at an observed decay rate until the next convective reexcitation. Population 1 stellar models at 0.30, 0.45, and 0.75 solar M were constructed to see if they have a near equality of radiative driving and damping also. If so, then stars down to late spectral class could possibly display solar-like oscillations. The near equality of radiative driving and damping occurs down to 0.5 solar M. Possibly 100 to 300 sec oscillations can be observed through most of the K spectral class, if magnetic activity does not overwhelm these small amplitude nonradial pulsations.
Cahn Julius H.
Cox Arthur N.
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