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On convection in stellar atmospheres far from local thermodynamic equilibrium

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Abstract

Non-thermal effects generated by sub-photospheric convection are considered. It is shown that convective cells are destroyed by shocks generated when convective velocities reach the speed of sound. Terminologically this process is given the name of ‘sonic-boom-interrupted convection’. An estimate is made on the dependence of convective velocities on stellar parameters. It is suggested that the process being investigated could explain why some stars do not belong to any branch of the theoretical Hertzsprung-Russell diagram.

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Authors and Affiliations

  1. Konkoly Observatory, Budapest, Hungary

    A. L. Grandpierre

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  1. A. L. Grandpierre
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Grandpierre, A.L. On convection in stellar atmospheres far from local thermodynamic equilibrium. Astrophys Space Sci 75, 307–314 (1981). https://doi.org/10.1007/BF00648644

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  • DOI: https://doi.org/10.1007/BF00648644

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