Solar cycle induced variations of the low L solar acoustic spectrum

Bibcode
1989A&A...224..253P
Palle, P. L.; Regulo, C.; Roca-Cortés, T.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 224, no. 1-2, Oct. 1989, p. 253-258. Research supported by CICYT.

Advertised on:
10
1989
Number of authors
3
IAC number of authors
3
Citations
92
Refereed citations
73
Description
Doppler velocity data are used to study solar cycle variation of the frequencies of solar acoustic oscillations from 1977 to 1988. The results show a clear shift in frequency of the cross-correlation peaks of -0.37 + or - 0.04 microHz peak to peak as the solar activity cycle progresses from maximum to minimum. This effect is dependent on the l value of the modes. The results suggest that, as low l modes penetrate deeply into the sun's interior, there are structural changes correlated with the solar activity cycle.
Type
Refereed
Helioseismology
Solar oscillations

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