Pure-helium 3D model atmospheres of white dwarfs

  title={Pure-helium 3D model atmospheres of white dwarfs},
  author={Elena Cukanovaite and P.-E. Tremblay and Bernd Freytag and H.-G. Ludwig and Pierre Bergeron},
  journal={Monthly Notices of the Royal Astronomical Society},
  • Elena Cukanovaite, P.-E. Tremblay, +2 authors Pierre Bergeron
  • Published 2018
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We present the first grid of 3D simulations for the pure-helium atmospheres of DB white dwarfs. The simulations were computed with the CO5BOLD radiation-hydrodynamics code and cover effective temperatures and surface gravities between 12 000 K ≲ Teff ≲ 34 000 K and 7.5 ≤ log g (cgs units) ≤ 9.0, respectively. In this introductory work, synthetic spectra calculated from the 3D simulations are compared to appropriate 1D model spectra under a differential approach. This results in the derivation… CONTINUE READING