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Is there a correlation between high-frequency global oscillations and solar flares?

Auteur

Chakraborty Sudeepto

Institution

HEPL, Stanford University

Theme

Low degree solar and stellar seismology
Auteur(s) supplémentaire(s)M. C. Rabello-Soares, R. S. Bogart
Institution(s) supplémentaire(s)HEPL, Stanford University

Abstract

Global oscillations have been observed in the high-frequency spectrum in velocity and intensity measurements, above the acoustic cutoff frequency of the solar atmosphere. In a recent work a strong correlation observed between helioseismic data and soft x-ray flux has been cited as evidence that solar flares may be one of the mechanisms whereby these high-frequency oscillations are excited. Here we investigate how the correlation between helioseismic time series from the instruments aboard SOHO and the soft x-ray data from GOES SXI might be influenced by the pre-analysis processing of the data as well as the analysis methodology.
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