Multiple scattering of seismic waves from ensembles of upwardly lossy thin flux tubes

Christopher Smedley Hanson, Paul Stuart Cally

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Our previous semi-analytic treatment of f f - and p p -mode multiple scattering from ensembles of thin flux tubes (Hanson and Cally, Astrophys. J.781, 125, 2014a; 791, 129, 2014b) is extended by allowing both sausage and kink waves to freely escape at the top of the model using a radiative boundary condition there. As expected, this additional avenue of escape, supplementing downward loss into the deep solar interior, results in substantially greater absorption of incident f f - and p p -modes. However, less intuitively, it also yields mildly to substantially smaller phase shifts in waves emerging from the ensemble. This may have implications for the interpretation of seismic data for solar plage regions, and in particular their small measured phase shifts.
Original languageEnglish
Pages (from-to)1889-1896
Number of pages8
JournalSolar Physics
Volume290
Issue number7
DOIs
Publication statusPublished - 2015

Keywords

  • Helioseismology, theory
  • Waves, magnetohydrodynamic

Cite this

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title = "Multiple scattering of seismic waves from ensembles of upwardly lossy thin flux tubes",
abstract = "Our previous semi-analytic treatment of f f - and p p -mode multiple scattering from ensembles of thin flux tubes (Hanson and Cally, Astrophys. J.781, 125, 2014a; 791, 129, 2014b) is extended by allowing both sausage and kink waves to freely escape at the top of the model using a radiative boundary condition there. As expected, this additional avenue of escape, supplementing downward loss into the deep solar interior, results in substantially greater absorption of incident f f - and p p -modes. However, less intuitively, it also yields mildly to substantially smaller phase shifts in waves emerging from the ensemble. This may have implications for the interpretation of seismic data for solar plage regions, and in particular their small measured phase shifts.",
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Multiple scattering of seismic waves from ensembles of upwardly lossy thin flux tubes. / Hanson, Christopher Smedley; Cally, Paul Stuart.

In: Solar Physics, Vol. 290, No. 7, 2015, p. 1889-1896.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Multiple scattering of seismic waves from ensembles of upwardly lossy thin flux tubes

AU - Hanson, Christopher Smedley

AU - Cally, Paul Stuart

PY - 2015

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AB - Our previous semi-analytic treatment of f f - and p p -mode multiple scattering from ensembles of thin flux tubes (Hanson and Cally, Astrophys. J.781, 125, 2014a; 791, 129, 2014b) is extended by allowing both sausage and kink waves to freely escape at the top of the model using a radiative boundary condition there. As expected, this additional avenue of escape, supplementing downward loss into the deep solar interior, results in substantially greater absorption of incident f f - and p p -modes. However, less intuitively, it also yields mildly to substantially smaller phase shifts in waves emerging from the ensemble. This may have implications for the interpretation of seismic data for solar plage regions, and in particular their small measured phase shifts.

KW - Helioseismology, theory

KW - Waves, magnetohydrodynamic

UR - http://link.springer.com/content/pdf/10.1007%2Fs11207-015-0732-x.pdf

U2 - 10.1007/s11207-015-0732-x

DO - 10.1007/s11207-015-0732-x

M3 - Article

VL - 290

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JO - Solar Physics

JF - Solar Physics

SN - 0038-0938

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ER -