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| Paper: |
Absorption of p Modes by Magnetic Plage |
| Volume: |
416, Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21 |
| Page: |
55 |
| Authors: |
Jain, R.; Hindman, B. W.; Braun, D. C.; Birch, A. C. |
| Abstract: |
The Sun’s magnetic active regions, composed of sunspots and plage, are
topologically complex. The magnetic field is highly structured, forming a
tangle of fibrils within the plage and more compact, regimented bundles
within sunspot umbrae. The fragmented nature of the field makes
helioseismic observations within active regions rather difficult to
interpret. We choose to study the propagation of acoustic waves through
regions of plage, modeling the magnetic field therein as a collection of
thin flux tubes. In this paper, we present the first results of this
research; the computation of the absorption coefficient from an ensemble
of many flux tubes. The incoming acoustic waves interact with the
magnetic flux tube, exciting sausage and kink tube waves which propagate
downward and upward carrying away energy, thereby producing absorption.
We calculate the resulting theoretical absorption coefficients and
compare with the most recent observations.
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