Helioseismic Observations at Stanford 1977-1986
Abstract
Observations of low degree modes of solar oscillation have been made at The Wilcox Solar Observatory at Stanford University for more than a decade. The authors are presently re-examining the set of observations from 1977 through 1986. They have first tested the stability of the p-mode frequencies for modes of degree l = 2 - 5 in each year. They find a marginally significant trend of a decrease in p-mode frequencies of 0.06 μHz per year. They have also examined the continuity of the observed signal at 160.01 minutes.
- Publication:
-
Advances in Helio- and Asteroseismology
- Pub Date:
- 1988
- Bibcode:
- 1988IAUS..123...29H