FUSE Observations of EC14026 Stars
Author
Chayer, P.
Fontaine, G.
Fontaine, M.
Lamontagne, R.
Wesemael, F.
Dupuis, J.
Heber, U.
Napiwotzki, R.
Moehler, S.
Attention
2299/3706
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.