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The slow winds of A-type supergiants

Granada, Anahí ; Curé, Michel ; Cidale, Lydia S.

In: Proceedings of the International Astronomical Union, 2010, vol. 6, no. S272, p. 184-185

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    Titre
    • The slow winds of A-type supergiants
    Auteur
    • Granada, Anahí. Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Argentina
    • Curé, Michel. Universidad de Valparaíso, Chile
    • Cidale, Lydia S.. Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Argentina
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Proceedings of the International Astronomical Union, 2010, vol. 6, no. S272, p. 184-185. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:294315
    Summary
    The line driven- and rotation modulated-wind theory predicts an alternative slow solution, besides from the standard m-CAK solution, when the rotational velocity is close to the critical velocity. We study the behaviour of the winds of A-type supergiants (Asg) and show that under particular conditions, e.g., when the δ line-force parameter is about 0.25, the slow solution could exist over the whole star, even for the cases when the rotational speed is slow or zero. We discuss density and velocity profiles as well as possible observational conterparts