Solar oscillations observed in the total irradiance

Details Solar oscillations observed in the total irradiance Solar oscillations observed in the total irradiance

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...82...67w&link_type=abstract

(International Astronomical Union and Akademiia Nauk SSSR, Colloquium on Problems of Solar and Stellar Oscillations, 66th, Nauch

Astronomy and Astrophysics

Astronomy

40

Irradiance, Radiometers, Solar Oscillations, Spaceborne Astronomy, Power Spectra, Seismology, Solar Flux, Solar Maximum Mission, Spectrum Analysis

Scientific paper

The total solar irradiance measurements obtained by the active-cavity radiometer on board the Solar Maximum Mission have been analyzed for evidence of global oscillations. The authors find that the most energetic low-degree p-mode oscillations in the five-minute band have amplitudes of a few parts per million of the total irradiance, and they positively detect modes with l = 0, 1, and 2. The distribution in l differs from that of the velocity spectrum, with relatively more power at lower l values. The authors do not detect the 160-min oscillation in the power spectrum, and place an upper limit of 5 parts per million (99,9 % confidence) on its amplitude.

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