Bibcode
Palle, Pere L.; Regulo, C.; Roca Cortés, Teodoro
Bibliographical reference
In ESA, Seismology of the Sun and Sun-Like Stars p 285-289 (SEE N89-25819 19-92)
Advertised on:
12
1988
Citations
3
Refereed citations
3
Description
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.