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Space Science Reviews

, Volume 94, Issue 1–2, pp 113–126 | Cite as

Theory of solar irradiance variations

  • H. Spruit
Article

Abstract

The theory of stellar structure can be used to identify the most plausible mechanisms for the irradiance variations associated with the solar cycle. Changes in surface emissivity, i.e. the reduced cooling in spots and enhanced emission by small scale magnetic fields, are the most effective mechanisms and account for most of the observed variation. New views of stellar surface convection developed from realistic numerical simulations changes the physical description of thermal perturbations of the solar envelope. Helioseismology will soon be able to test the consequences of changes in surface emissivity, and distinguish them from other scenarios for irradiance variability.

Keywords

Magnetic Field Convection Emissivity Solar Cycle Solar Irradiance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • H. Spruit
    • 1
  1. 1.Max-Planck-Institut für AstrophysikGarchingGermany

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