Computer Science
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..479b&link_type=abstract
In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000,
Computer Science
2
Sun: Oscillations, Data Analysis
Scientific paper
We present the results obtained from the analysis of 4-year long GOLF and MDI time series. The GOLF time series includes the period where the instrument operated in the blue wing of the doublet Na D lines, and also the data from the current red-wing photometric mode. Disk-averaged MDI velocity signals from the calibrated level-1.4 MDI LOI-proxy Doppler images were obtained using integrated spatially weighted masks. The analysis was carried out by Random-Lag Singular Cross-Spectrum Analysis. This technique searches for simultaneous oscillatory components in two or more time series, and has been proven to be very effective for the identification of solar acoustic modes of low angular degree and low radial order. In the present work we have extended our analysis to the frequency range between 200 and 1500 microHZ, which includes the region of low radial order gravity modes. Selected cases are presented and compared with the results obtained using classical spectral estimations based on Fourier transforms.
Bertello Luca
Couvidat Sebastien
Garcia Rafael A.
Henney Carl John
Turck-Chieze Sylvaine
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