Sun-as-a-star: Its convective signature and the activity cycle
Abstract
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.
- Publication:
-
IAU Colloq. 130: The Sun and Cool Stars. Activity, Magnetism, Dynamos
- Pub Date:
- 1991
- DOI:
- 10.1007/3-540-53955-7_135
- Bibcode:
- 1991LNP...380..246L