The Pulsating DA White Dwarf Star EC 14012-1446
- Author(s)
- Gerald Handler, E Romero-Colmenero
- 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 Msun, 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 (? ? =10.2 ± 0.2 ?Hz), with the exception of one doublet whose splitting is only 6.3 ?Hz. 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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- South African Astronomical Observatory (SAAO)
- Pages
- 569-572
- Publication date
- 2005
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/1b3b7e6b-a9fc-4c8f-b214-fd210f9e590a