Now showing items 1-6 of 6

  • New chemical profiles for the asteroseismolofy of ZZ Ceti stars 

    Althaus, Leandro Gabriel; Córsico, Alejandro Hugo; Bischoff-Kim, A.; Romero, A.D.; Renedo Rouco, Isabel; García-Berro Montilla, Enrique; Miller Bertolami, Marcelo M (2010-07-10)
    Article
    Open Access
    We compute new chemical profiles for the core and envelope of white dwarfs appropriate for pulsational studies of ZZ Ceti stars. These profiles are extracted from the complete evolution of progenitor stars, evolved through ...
  • New cooling sequences for old white dwarfs 

    Renedo Rouco, Isabel; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo M; Romero, A.D.; Córsico, Alejandro Hugo; Rohrmann, Rene Daniel; García-Berro Montilla, Enrique (2010-07)
    Article
    Restricted access - publisher's policy
    We present full evolutionary calculations appropriate for the study of hydrogen-rich DA white dwarfs. This is done by evolving white dwarf progenitors from the zero-age main sequence, through the core hydrogen-burning phase, ...
  • Revisiting the theoretical DBV (V777 Her) instability strip: The MLT theory of convection 

    Córsico, Alejandro Hugo; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo M; García-Berro Montilla, Enrique (2009-06-01)
    Article
    Restricted access - publisher's policy
    We reexamine the theoretical instability domain of pulsating DB white dwarfs (DBV or V777 Her variables). We performed an extensive g-mode nonadiabatic pulsation analysis of DB evolutionary models considering a wide range ...
  • Seismological constraints on the high-gravity DOV stars PG 2131+066 and PG 1707+427 

    Córsico, Alejandro Hugo; Althaus, Leandro Gabriel; Miller Bertolami, Marcelo M; García-Berro Montilla, Enrique (2009-06-01)
    Article
    Restricted access - publisher's policy
    A seismological study of the pulsating PG1159 stars PG2131+066 and PG 1707+427 is presented. We perform extensive adiabatic computations of g-mode pulsation periods of PG1159 evolutionary models with stellar masses ranging ...
  • The effect of 22Ne diffusion in the evolution and pulsational properties of white dwarfs with solar metallicity prgenitors 

    Camisassa, Maria E; Althaus, Leandro G.; Corsico, Alejandro H.; Vinyoles, Núria; Serenelli, Aldo M.; Isem, Jordi; Miller Bertolami, Marcelo M; García-Berro Montilla, Enrique (Institute of Physics (IOP), 2016-06-01)
    Article
    Open Access
    © 2016. The American Astronomical Society. All rights reserved. Because of the large neutron excess of 22Ne, sedimentation of this isotope occurs rapidly in the interior of white dwarfs. This process releases an additional ...
  • White dwarf evolutionary sequences for low-metallicity progenitors: The impact of third dredge-up 

    Althaus, Leandro G.; Camisassa, Maria E; Miller Bertolami, Marcelo M; Corsico, Alejandro H.; García-Berro Montilla, Enrique (2015-04-01)
    Article
    Open Access
    Context. White dwarfs are nowadays routinely used as reliable cosmochronometers, allowing several stellar populations to be dated.; Aims. We present new white dwarf evolutionary sequences for low-metallicity progenitors. ...