A New Solar Fluctuation
Abstract
The fluctuation in the solar-oblateness signal during 1966 has been found to be strongly autocorrelated with a 25.3-day lag. The autocovariance functions show that the disturbed regions of the Sun occur in the vicinity of +45 latitude for which the synodic rotation period is 29.5 days. The 25-day correlation peak is positive as expected, but there is no indication of the equally strong 13-day negative halfrotation peak that would also be expected. It is concluded that the 25-day correlation may be due to density fluctuations occurring near the top of the radiative zone.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1972
- DOI:
- 10.1086/151650
- Bibcode:
- 1972ApJ...176..479D