Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.x7001s&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Analyses of Homestake and GALLEX-GNO data yield persuasive evidence for rotational modulation and related modulations of the solar neutrino flux. We find in Homestake data evidence that (1) the variance is significantly larger than that found in Monte Carlo simulations; (2) the power spectrum contains a significant peak at 12.88 y-1 (period 28.4 days); (3) the spectrum also contains four sidebands displaced by ± 1 y-1 and ± 2 y-1; (4) the variance of the data shows a significant heliographic N/S asymmetry; (5) a time series reconstructed from power spectrum analysis exhibits a heliographic-latitude-dependent variance; and (6) the spectrum formed from the variance of the reconstructed flux has a notable peak at 1 y-1. We find from analysis of GALLEX-GNO data that (7) there is a significant periodicity at 13.59 y-1 (period 26.9 days); and (8) the histogram is bimodal. From a comparative analysis of Homestake and GALLEX-GNO data, we find (9) evidence for variations attributable to r-mode oscillations with l = 3, m = 1,2,3 in a region with synodic rotation rate 12.88 y-1. From analysis of X-ray data acquired by the SXT instrument on Yohkoh, we find that the corona exhibits two discrete rotation rates, and that (10) the coronal rotation frequencies are virtually identical to the principal frequencies in the Homestake and GALLEX-GNO spectra.
Scargle Jeffrey
Sturrock Peter
Walther Guenther
Weber Matthias
Wheatland Mike
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