Back to Volume
Paper: An Asteroseismological Analysis of the Short-Period Pulsating sdB star EC 05217-3914
Volume: 334, 14th European Workshop on White Dwarfs
Page: 635
Authors: Billeres, M.; Fontaine, G.
Abstract: 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.
Back to Volume