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

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

doi:10.1088/1742-6596/118/1/012091

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

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

Physics

Freiburg Center for Data Analysis and Modeling (FDM); Albert-Ludwigs-Universität Freiburg

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

1 Citation (Scopus)

Abstract

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 language	English
Title of host publication	Proceedings of the Second HELAS International Conference
Editors	L Gizon, M Roth
Place of Publication	Bristol
Publisher	IOP Publishing Ltd.
Pages	12091-12091
Number of pages	5
Volume	118
DOIs	https://doi.org/10.1088/1742-6596/118/1/012091
Publication status	Published - 2008
Event	International Conference on Helioseismology, Asteroseismology and MHD Connections (HELAS II) - Gottingen Duration: 20 Aug 2007 → 24 Aug 2008

Conference

Conference	International Conference on Helioseismology, Asteroseismology and MHD Connections (HELAS II)
City	Gottingen
Period	20/08/07 → 24/08/08

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Cite this

Cross-spectral analysis of solar oscillation time series - art. no. 012091. / Schad, Ariane; Roth, Markus; Schelter, Bjoern et al.
Proceedings of the Second HELAS International Conference. ed. / L Gizon; M Roth. Vol. 118 Bristol: IOP Publishing Ltd., 2008. p. 12091-12091.

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Schad, A, Roth, M, Schelter, B, von der Luehe, O & Timmer, J 2008, Cross-spectral analysis of solar oscillation time series - art. no. 012091. in L Gizon & M Roth (eds), Proceedings of the Second HELAS International Conference. vol. 118, IOP Publishing Ltd., Bristol, pp. 12091-12091, International Conference on Helioseismology, Asteroseismology and MHD Connections (HELAS II), Gottingen, 20/08/07. https://doi.org/10.1088/1742-6596/118/1/012091

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abstract = "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.",

author = "Ariane Schad and Markus Roth and Bjoern Schelter and {von der Luehe}, Oskar and Jens Timmer",

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AU - Timmer, Jens

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

U2 - 10.1088/1742-6596/118/1/012091

DO - 10.1088/1742-6596/118/1/012091

M3 - Published conference contribution

VL - 118

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BT - Proceedings of the Second HELAS International Conference

A2 - Gizon, L

A2 - Roth, M

PB - IOP Publishing Ltd.

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T2 - International Conference on Helioseismology, Asteroseismology and MHD Connections (HELAS II)

Y2 - 20 August 2007 through 24 August 2008

ER -

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

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