Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh52a..01b&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SH52A-01
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7524 Magnetic Fields, 7536 Solar Activity Cycle (2162), 7537 Solar And Stellar Variability, 7544 Stellar Interiors And Dynamo Theory
Scientific paper
Charles Greeley Abbot was correct in predicting the solar constant is decidedly inconstant. Indeed, the solar irradiance exhibits pronounced variations on nearly all currently accessible observational time scales. There is overwhelming evidence for a tight correlation between the Sun's magnetic activity cycle and broadband spectral irradiance in the sense that greater magnetic activity implies excess irradiance and vice-versa. Global dynamical and evolutionary processes determine the time-averaged solar luminosity. In this realm the variable magnetic field is of no consequence. It is therefore of interest to ask how deep within the solar envelope and interior do the irradiance fluctuations persist, and from where do they originate. Observational and theoretical evidence will be presented to suggest that an answer to this fundamental question may soon be in hand.
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