Anisotropies in solar oscillations

Details Anisotropies in solar oscillations Anisotropies in solar oscillations

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232..516c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 2, June 1990, p. 516-519.

Astronomy and Astrophysics

Astrophysics

Anisotropy, Solar Oscillations, Solar Rotation, Data Reduction, Power Spectra, Spherical Harmonics

Scientific paper

Spherical harmonic filtering 20 less than or equal to l = m less than or equal to 100 has been applied to analyze a time series of Doppler observations in Na light in order to find eventual anisotropies between sectorial modes propagating along east-west and north-south directions. The results obtained show that the strongest power is connected with the north-south direction and that the power ratio NS/EW grows linearly with l.

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