On convection in stellar atmospheres far from local thermodynamic equilibrium

Details On convection in stellar atmospheres far from local thermodynamic equilibrium On convection in stellar atmospheres far from local thermodynamic equilibrium

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..75..307g&link_type=abstract

Astrophysics and Space Science, vol. 75, no. 2, Apr. 1981, p. 307-314.

Astronomy and Astrophysics

Astrophysics

5

Astrophysics, Convective Heat Transfer, Nonequilibrium Thermodynamics, Stellar Atmospheres, Benard Cells, Propagation Velocity, Shock Wave Propagation, Sonic Booms

Scientific paper

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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