On the constancy of intermediate-degree p-mode frequencies during the declining phase of solar cycle 21

A comparison was made between two sets of frequencies of intermediate-degree solar p-mode oscillations obtained in late 1981 and mid-1984. Good agreement was found at the 0.02 microHz level despite the 2.6 yr interval separating the two sets of observations. In particular, a comparison was made betw...

Full description

Bibliographic Details
Main Authors: Rhodes, Edward J., Jr., Woodard, Martin F., Cacciani, Alessandro, Tomczyk, Steven, Korzennik, Sylvain G.
Format: Other/Unknown Material
Language:unknown
Published: 1988
Subjects:
92
South Pole
Mount Wilson
South pole
Online Access:http://ntrs.nasa.gov/search.jsp?R=19880041574
Description
Summary:A comparison was made between two sets of frequencies of intermediate-degree solar p-mode oscillations obtained in late 1981 and mid-1984. Good agreement was found at the 0.02 microHz level despite the 2.6 yr interval separating the two sets of observations. In particular, a comparison was made between the frequencies of 573 modes obtained at the South Pole during December 24-25, 1981 and those of the same modes as observed at the Mount Wilson Observatory 60-ft Solar Tower during July 29-August 13, 1984. The present results are consistent with no change in intermediate-degree p-mode frequencies between late 1981 and mid-1985.

Similar Items