Resonance absorption of solar p-modes by sunspots

Details Resonance absorption of solar p-modes by sunspots Resonance absorption of solar p-modes by sunspots

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335.1005h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 15, 1988, p. 1005-1014.

Computer Science

Sound

76

Propagation Modes, Solar Oscillations, Sound Waves, Sunspots, Wave Propagation, Absorptivity, Conjugate Gradient Method, Incidence, Magnetosonic Resonance

Scientific paper

Braun, Duvall, and LaBonte have reported recently that the power in outgoing p-modes in the vicinity of sunspots is significantly less than the incoming power. Here, the author considers the possibility that the energy deficit is due to resonance absorption, which occurs when the sunspot boundary has a nonzero thickness. A simple planar analysis is used to examine the conditions required for resonance absorption, and to estimate the absorption coefficient. It is found that resonance absorption can be significant under certain circumstances, but that, on the whole, it probably cannot explain the substantial loss of p-mode power observed.

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