Cross-spectral analysis of solar oscillation time series - art. no. 012091

Ariane Schad, Markus Roth, Bjoern Schelter, Oskar von der Luehe, Jens Timmer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Spatial leakage is an unavoidable artifact in the extraction of solar oscillation modes by spheric harmonic decomposition from the wavefield observed on the solar surface. The determination of solar frequencies by spectral analysis is therefore greatly affected by spatial leakage. Here we show in which way spatial leakage also influences the cross-spectra between different solar oscillation modes. Simulations show that spatial leakage induces significant coherences between oscillations of degree l and l + 2 with low azimuthal order m.

Original languageEnglish
Title of host publicationProceedings of the Second HELAS International Conference
EditorsL Gizon, M Roth
Place of PublicationBristol
PublisherIOP Publishing Ltd.
Number of pages5
Publication statusPublished - 2008
EventInternational Conference on Helioseismology, Asteroseismology and MHD Connections (HELAS II) - Gottingen
Duration: 20 Aug 200724 Aug 2008


ConferenceInternational Conference on Helioseismology, Asteroseismology and MHD Connections (HELAS II)

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