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Magnetic Fields and Convection: New Observations

Published online by Cambridge University Press:  04 August 2017

W. C. Livingston
W. C. Livingston*
Affiliation:
Kitt Peak National Observatory

Abstract

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Fourier Transform Spectrometer observations of Fraunhofer line displacement and asymmetry suggest that granular convection is inhibited in regions of magnetic activity. We discuss the observations and a method for removing the effects of solar rotation. In integrated sunlight (“the sun-as-a-star”) records of line asymmetries indicate that a significant reduction in the amplitude of the sun's convective signature took place between 1980 and 1982. To the extent that full disk line asymmetry arises strictly from convective motions, the results constitute strong evidence that magnetic activity influences (inhibits) convective motion on a global scale.

Type
II. Rotation — Activity — Cycle — Age Connection: Observations
Information
Symposium - International Astronomical Union , Volume 102: Solar and Stellar Magnetic Fields: Origins and Coronal Effects , 1983 , pp. 149 - 153
Copyright
Copyright © Reidel 1983 

References

Babcock, H. D. and Herzberg, L.: 1948, Astrophys. J. 108, p. 167–190.Google Scholar
Brault, J. and Lerner, R.: 1982, private communication.Google Scholar
Crosswhite, H. M.: 1958, Johns Hopkins Spectroscopic Report No. 13.Google Scholar
Dearborn, D. S. P. and Blake, J. B.: 1982, Astrophys. J. 257, p. 896–900.Google Scholar
Dravins, D., Lindegren, L. and Nordlund, Å.: 1981, Astron. Astrophys. 96, p. 345–364.Google Scholar
Dravins, D.: 1982, Ann. Rev. Astron. Astrophys. 20 (in press).Google Scholar
Livingston, W. C.: 1982, Nature 297, pp. 208–209.Google Scholar
Muller, R.: 1977, Solar Phys. 52, p. 249–262.Google Scholar
Nordlund, Å.: 1982, Astron. Astrophys. 107, p. 1–10.Google Scholar
Nordlund, Å.: 1982, Astron. Astrophys., (in press).Google Scholar
Spiegel, E. A. and Weiss, N. O.: 1980, Nature 287, pp. 616–617.Google Scholar
Thomas, J. H.: 1977, Nature 280, pp. 662–663.Google Scholar