Physics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..285p&link_type=abstract
In ESA, Seismology of the Sun and Sun-Like Stars p 285-289 (SEE N89-25819 19-92)
Physics
3
Solar Activity, Solar Activity Effects, Solar Cycles, Solar Oscillations, Solar Spectra, Cross Correlation, P Waves, Power Spectra, Solar Physics, Stellar Spectrophotometry
Scientific paper
Data obtained at the Observatorio del Teide (Tenerife) during the years 1978 to 1988 using a resonant scattering spectrophotometer, is analyzed to look for variations of the low degree p-mode frequencies along the solar cycle. The analysis based on the cross-correlation of power spectra suggests that the variation of its maximum correlation correlates well with the solar cycle. An overall variation, from minimum to maximum solar activity, of 0.5 + or - 0.1 micro Hz is found, when low l modes are considered. This effect depends on the l values of the modes being absent for l=0 and of 0.7 + or - 0.1 micro Hz for l=1. Therefore, other interpretations than a simple frequency shift are plausible, such as different amplitudes between modes in the same multiplet or an asymmetric change of the splitting along the solar cycle.
Pallé Pere Lluis
Regulo Clara
Roca Cortes Teodoro
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