The Acoustic Showerglass C. Lindsey and D. C. Braun
Vantages • a) Subjacent---------- • b) Lateral -------------
Statistics of local eression control correlation as a function of magnetic field
Statistics of local ingression control correlation as a function of manetic field.
Lateral Vantage Egression-Ingression Correlations (left column) and Green’s functions (right) over lateral-vantage pupils.
Lateral vantage phase correlations of active region (left column) compared with the same applied to the quiet Sun with showerglass correction applied in phase reverse (right).
Diagnostic south-north plot of egression-ingression correlation through large sunspot.
“Cool-Hot” Model • Model of simple acoustic anomaly characterized by constant sound speed deficit (cool) in the depth range 0-3 Mm with underlying constant sound-speed excess from 3-10 Mm.
Depression Model • Model of 350 km Wilson depression (closely equivalent to a superficial sound speed excess).
Showerglass Corrected Phase Correlations • Showerglass corrected correlation phases. Left column shows phase maps at same contrast as uncorrected phases (slides 8 and 9). Right column shows phases at contrast enhanced by factor of 3.
Showerglass Corrected Phase Correlations • Showerlass corrected correlation phases are integrated over two consecutive 10-hr time series (left and right columns, respectively).
Showerglass Corrected Phase Correlations • Consecutive showerglass corrected phase correlations with magnetic proxies temporally swapped to estimate errors due evolution of the active region during the integration.
Correlation Phases for Simple Acoustic Anomalies • Correlations phases for “Cool-Hot” model and photospheric depression are compared with correlation phases of sunspots observed by MDI.