Titre du document

Magnetic activity and variations in solar luminosity

Lien vers le document
Nom du Corpus

AstroConcepts

Auteur(s)
  • E. A. Spiegel
  • N. O. Weiss
Résumé

Attempts to detect changes in the solar luminosity suggest that the solar constant has been misnamed14. Although the Nimbus satellite data4 show no significant fractional variations above 5 103 during the period 197578, results from recent balloon5 and rocket6 flights show changes of 4 103. Intense magnetic fields in sunspots hamper convection locally7 but active regions are believed not to be directly responsible for long term variations in luminosity of the Sun8 or of RS CVn and BY Dra stars9. The cause of luminosity variations over spot cycles should be sought in more deep-seated global features. Here we indicate how strong magnetic fields at the base of the convective zone can alter the local convection. The resulting changes in thermal energy are large enough to produce variations of order 0.1% in the solar luminosity over the 11-yr sunspot cycle.

Langue(s) du document
Indéterminé
Année de publication
1980
Revue

Nature

Éditeur
Nature
Type de publication
journal
Type de document
research-article
Présence de XML structuré
Oui
Version de PDF
1.3
Score de qualité du texte
3.718
Nom du concept
  • BY Draconis stars
Catégories Science-Metrix
  • 1 - general ; 2 - general science & technology ; 3 - general science & technology
Catégories Inist
  • 1 - sciences appliquees, technologies et medecines ; 2 - sciences exactes et technologie ; 3 - terre, ocean, espace ; 4 - geophysique externe
Catégories Scopus
  • 1 - General ; 2 - Multidisciplinary ; 3 - Multidisciplinary
Catégories WoS
  • 1 - science ; 2 - multidisciplinary sciences
Identifiant ISTEX
682D9A9CEC62EFE67BFCA15EFDBDB30DAB5FD1E4
ark:/67375/GT4-H7L22KGP-N
Powered by Lodex 9.4.5