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Convective Overshooting in the Solar Photosphere; a model Granular Velocity Field

Published online by Cambridge University Press:  15 February 2018

Åke Nordlund
Åke Nordlund*
Affiliation:
NORDITA, Blegdamsvej 17, Copenhagen, Denmark

Extract

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The solar granulation, with its horizontal temperature fluctuations, and its associated velocity field, is a consequence of overshooting convective motions. Theoretical estimates of the magnitude of the temperature fluctuations and mass fluxes involved were obtained in a recent paper (Nordlund, 1976, Astronomy & Astrophys. 50, 23). Here, a simple model of the instantaneous granular velocity field is presented, and the effects of this velocity field on photospheric spectral lines are described.

Type
VI. Penetration
Information
International Astronomical Union Colloquium , Volume 38: Problems of Stellar Convection , 1977 , pp. 237 - 238
Copyright
Copyright © 1976