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FUSE Observations of EC14026 Stars |
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| Authors: | P Chayer G Fontaine M Fontaine R Lamontagne F Wesemael J Dupuis U Heber R Napiwotzki S Moehler |
| Institution: | 1. Bloomberg Center for Physics and Astronomy, Johns Hopkins University, 3400 N Charles St., Baltimore, MD, USA 2. Department of Physics and Astronomy, University of Victoria, USA 3. Département de Physique, Université de Montréal, USA 4. Dr. Remeis-Sternwarte, Astronomisches Institut der Universit?t Erlangen-Nürnberg, Germany 5. Institut für Theoretische Physik und Astrophysik der Universit?t Kiel, Germany |
| Abstract: | We present a FUSE abundance analysis of EC14026 stars. We compare the abundances of heavy elements in the atmospheres of EC14026 stars to non-pulsating stars with similar atmospheric parameters, and investigate whether weak stellar winds could explain the coexistence of variable and non-variable sdB stars in the log g – Teff diagram. We also present preliminary results on time-dependent diffusion calculations of iron in presence of radiative levitation and mass loss, and show how weak stellar winds can affect the diffusive equilibrium between gravitational settling and radiative support. |
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