Mathematics – Logic
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..334..635b&link_type=abstract
14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004
Mathematics
Logic
3
Scientific paper
We present the results of a detailed asteroseimological analysis of the southern hemisphere sdB pulsator EC 05217-3914. This analysis rests on our gathering of high S/N ratio observations at the NTT using the SUSI2 camera. Some 37 h of data were obtained over a 5 night run. We uncovered several frequency components in the period range 129-218 s, several of which form multiplets with equally spaced components. The latter are best explained in terms of rotational splitting in a star with a rotation period of 13.1 h. Excluding the rotationally-split components, we identified 5 independent pulsation modes with which to play the game of asteroseismology. Using an efficient period-matching code we explored the parameter space and found an excellent fit to the observed periods. We present the results of this exercise: our preliminary identification of the pulsation modes in EC 05217-3914 and the determination of its fundamental parameters through asteroseismology.
Billeres Malvina
Fontaine Gérard
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