Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-11-06
Astronomy and Astrophysics
Astrophysics
Scientific paper
10.1051/0004-6361:20078171
The G9.5 giant eps Oph shows evidence of radial p-mode pulsations in both radial velocity and luminosity. We re-examine the observed frequencies in the photometry and radial velocities and find a best model fit to 18 of the 21 most significant photometric frequencies. The observed frequencies are matched to both radial and nonradial modes in the best model fit. The small scatter of the frequencies about the model predicted frequencies indicate that the average lifetimes of the modes could be as long as 10-20d. The best fit model itself, constrained only by the observed frequencies, lies within 1 sigma of eps Oph's position in the HR-diagram and the interferometrically determined radius.
Guenther David B.
Huber Daniel
Kallinger Th.
Kuschnig Rainer
Matthews Jaymie M.
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