f-Mode interactions with thin flux tubes: The scattering matrix

Shravan Hanasoge, A. C. Birch, T. J. Bogdan, Laurent Gizon

Research output: Contribution to journalArticle

Abstract

We calculate the scattering effects associated with the interaction of a surface gravity or f-mode with a thin magnetic flux tube embedded in a realistically stratified medium. We find that the dominant scattered wave is an f-mode with amplitude and phase of 1.17% and around 50° relative to the incident wave, compared to the values of 0.13% and 40° estimated from observations. The extent of scattering into high-order acoustic p-modes is too weak to be accurately characterized. We recover the result that the degree of scattering is enhanced as (1) the frequency of the incident wave increases and (2) the flux tube becomes magnetically dominated.

Original languageEnglish (US)
Pages (from-to)774-780
Number of pages7
JournalAstrophysical Journal
Volume680
Issue number1
DOIs
StatePublished - Jun 10 2008

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S matrix theory
scattering
tubes
matrix
interactions
magnetic flux
acoustics
gravity
gravitation

Keywords

  • Hydrodynamics
  • Sun: helioseismology
  • Sun: interior
  • Sun: oscillations
  • Waves

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science

Cite this

f-Mode interactions with thin flux tubes : The scattering matrix. / Hanasoge, Shravan; Birch, A. C.; Bogdan, T. J.; Gizon, Laurent.

In: Astrophysical Journal, Vol. 680, No. 1, 10.06.2008, p. 774-780.

Research output: Contribution to journalArticle

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