Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2210l&link_type=abstract
American Astronomical Society Meeting 210, #22.10; Bulletin of the American Astronomical Society, Vol. 39, p.126
Astronomy and Astrophysics
Astronomy
Scientific paper
Theoretical research by Nigam, Rast, and Skartlien suggest that seismic emission from the quiet Sun can be significantly characterized in terms of sequences of monopole, dipole and quadrupole transients associated with down-flowing plumes in intergranular lanes. This would result in a significant phase relationship between seismic radiation emitted downward, into the solar interior, and seismic radiation emitted directly upward, into the overlying quiet photosphere. One major result, if the composite monopole and quadrupole transient were generally comparable in power to the dipole component, would be a significant difference in the seismic radiation emitted directly upward from that emitted downward, into the solar interior. I will discuss what the analysis of numerical simulations of seismic emission as a result of turbulence can tell us about this hypothetical anisotropy. Comparisons between high-frequency seismic emission from the quiet Sun and from magnetic regions offer a promising diagnostic role in the investigation of seismic emission anisotropy.
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