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Sun-as-a-star: Its Convective Signature and the Activity Cycle

Published online by Cambridge University Press:  12 April 2016

W. Livingston
W. Livingston*
Affiliation:
National Solar Observatory, NOAO, P.O. Box 26732, Tucson, AZ 85726

Abstract

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From May 1980 to April 1990 we have observed several times a year the solar irradiance spectrum from 5000Å to 6300Å using the 1-m Fourier Transform Spectrometer. During the ascending phase of the solar cycle, spectrum line asymmetry diminishes about 15% as the total magnetic field encreases. At some epoch near the time of total magnetic field maximum, line asymmetry ceases to track surface magnetism and abruptly assumes a value appropriate to solar minimum.

Type
Part III Solar magnetism and large-scale flows
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 246 - 251
Copyright
Copyright © Springer-Verlag 1991

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