Variation of the low-degree solar acoustic mode parameters over the solar cycle

Bibcode
2002SoPh..209..247J
Jiménez, A.; Roca Cortés, T.; Jiménez-Reyes, S. J.
Bibliographical reference

Solar Physics, v. 209, Issue 2, p. 247-263 (2002).

Advertised on:
10
2002
Journal
Solar Physics
Number of authors
3
IAC number of authors
3
Citations
43
Refereed citations
38
Description
VIRGO/SPM is a helioseismic sunphotometer on board SOHO that observes the disk-integrated sunlight irradiance at three different colors (red, green, and blue). The data obtained for SPM since the beginning of the SOHO mission, April 1996, to March 2001 have been used to study the differences of the p-mode parameters during the solar activity cycle. These time series have been divided in sub-series of 100 days, transformed to power spectra and averaged in sets of three to yield a total number of six averaged power spectra (around one per year). A new way of analyzing the power spectrum has been applied to the six power spectra of each color; it consists of fitting the whole p-mode spectrum at once with a unique background. The results for the frequencies, line widths, power, mode energy, energy rate fed in the mode and splittings along the activity cycle are found, compared and discussed.
Type
Refereed

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