Search for Solar P-Mode Frequency Changes Between 1980 and 1985

Details Search for Solar P-Mode Frequency Changes Between 1980 and 1985 Search for Solar P-Mode Frequency Changes Between 1980 and 1985

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177l..47f&link_type=abstract

Astronomy and Astrophysics, Vol.177, NO.1/2MAY(I), P. L47, 1987

Astronomy and Astrophysics

Astrophysics

32

Scientific paper

704 hours of solar full disk velocity measurements obtained at the South Pole between the end of November, 1984 and early February, 1985 have been analyzed. The p-mode power spectrum of this data and that obtained in 1980 with the SMM / ACRIM instrument are compared by a cross-correlation method. Taking into account the small bias in the analysis due to the different window functions and to the different relative responses to modes of degree 0 to 3, a frequency decrease of 0.39 μHz is found, with an uncertainty estimated at 0.04 μHz.

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