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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 730232.0, MPI für Astronomie / Publikationen_mpia
Instabilities in the envelope of Wolf-Rayet stars
Authors:Grassitelli, L.; Langer, N.; Sanyal, D.; Fossati, L.; Bestenlehner, J. M.
Place of Publication:Potsdam
Publisher:Universitätsverl. Potsdam
Date of Publication (YYYY-MM-DD):2015
Audience:Not Specified
Abstract / Description:Wolf-Rayet stars are very hot stars close to the Eddington limit. In the conditions encountered in their radiation pressure dominated outer layers several instabilities are expected to arise. These instabilities could influence both the dynamic of their optically thick winds and the observed spectral lines introducing small and large scale variability. We investigate the conditions in the convective envelopes of our helium star models and relate them to the appearance of a high number of stochastic density inhomogeneities, i.e. clumping in the optically thick wind. We also investigate the pulsational stability of these envelope, considering the effect of the high stellar wind mass loss rates.
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2015wrs..conf..201G
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