Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..479r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 479-485. Research supported by the Universita di Rom
Astronomy and Astrophysics
Astrophysics
17
Solar Cycles, Solar Oscillations, Frequency Shift, Vibration Mode
Scientific paper
A comparison of two sets of frequencies of intermediate-degree (6 ≤ l ≤ 89) solar p-mode oscillations obtained in late 1981 and in mid-1984 shows agreement at the level of 0.02 μHz, or better than one part in 105. In particular, the frequencies of 573 modes obtained at the South Pole during 1981 December 24 - 25, (reported by Duvall, Harvey, and Pomerantz in 1987) were compared with the frequencies of the same modes as observed at the Mount Wilson Observatory 60 foot Solar Tower from 1984 July 29 through August 13. It is concluded that the data are consistent with no change in intermediate-degree p-mode frequencies between late 1981 and mid-1985.
Cacciani Alessandro
Korzennik Sylvain G.
Rhodes Edward J. Jr.
Tomczyk Steven
Ulrich Roger K.
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