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Challenges to Theories of the Structure of Moderate-Mass Stars pp 259–264Cite as

Effects of spatial filtering on high-ℓ power spectra and rotational splitting inversions

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Part of the book series: Lecture Notes in Physics ((LNP,volume 388))

Abstract

The effects of the spatial filtering algorithm on the results of an inversion of high-degree solar oscillation data are examined. In attempting to isolate sectoral modes, the Fourier transforms in longitude are accompanied by three different spatial filterings in the orthogonal direction. The filters are: simple averaging in the plane of the sky, averaging along lines of constant heliographic longitude with uniform weighting, and another with weighting based on appropriate Legendre functions. The choice of spatial filter changes the distribution of power in the two-dimensional spectrum of the oscillations, particularly in the f and p 1 ridges. These variations in the power distribution affect the determination of the rotational splittings, thereby influencing the results of inversions which emphasize information contained in the low-order ridges.

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References

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Author information

Authors and Affiliations

  1. National Solar Observatory, National Optical Astronomy Observatories, Sunspot, New Mexico, USA

    Deborah A. Haber

  2. Colorado College, Colorado Springs, Colorado, USA

    Deborah A. Haber

  3. National Solar Observatory, National Optical Astronomy Observatories, Tucson, Arizona, USA

    Frank Hill

  4. Institute for Theoretical Physics, University of California, Santa Barbara, California, USA

    Frank Hill & Juri Toomre

  5. Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado, USA

    Juri Toomre

Authors
  1. Deborah A. Haber
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  2. Frank Hill
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  3. Juri Toomre
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Editor information

Douglas Gough Juri Toomre

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© 1991 Springer-Verlag

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Haber, D.A., Hill, F., Toomre, J. (1991). Effects of spatial filtering on high-ℓ power spectra and rotational splitting inversions. In: Gough, D., Toomre, J. (eds) Challenges to Theories of the Structure of Moderate-Mass Stars. Lecture Notes in Physics, vol 388. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-54420-8_75

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  • DOI: https://doi.org/10.1007/3-540-54420-8_75

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-54420-3

  • Online ISBN: 978-3-540-38355-0

  • eBook Packages: Springer Book Archive

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