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Paper: The Pulsating DA White Dwarf Star EC 14012-1446
Volume: 334, 14th European Workshop on White Dwarfs
Page: 569
Authors: Handler, G.; Romero-Colmenero, E.
Abstract: We analyse the pulsation spectrum of the high-amplitude DAV star EC 14012-1446 derived from two observing runs. We detect seven pulsation frequencies that we suggest to be consecutive radial overtones of l=1 modes. The mean period spacing of the eigenmodes (53.8 ± 2.3 s) implies a mass of 0.48 ± 0.03 MSolar, inconsistent with spectroscopic log g determinations.

Our mode identification is corroborated by an analysis of the combination frequencies. Several of the eigenmodes seem to be part of rotationally split multiplets (Δν = 10.2 ± 0.2μHz), with the exception of one doublet whose splitting is only 6.3 μHz. However, we have no reason to believe that this mode is l=1 and the others are l=2 and speculate it may be a trapped mode.

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