In the present paper we propose a new application of time-distance analysis. we show that time-distance measurements in helioseismic tomography ( Duvall, Jr. et al, 1993; 1997) can be used for estimate of the energy flux on the solar surface. Non-reciprocity of travel time along the ray path and different parity properties of sound speed, flow velocity and magnetic field, allow one to obtain the information on large scale distribution of plasma flows and magnetic fields (Ryutova and Scherrer, 1997). Here we extend our analysis and show that the covariance of sum and difference of the reciprocal travel times is a measure of large-scale, "climatological" heat flux, and covariance of sum and difference of their departures from the mean, gives an estimate for the magnetic energy flux. Using the reciprocal travel times measured in North-South and West-East directions one can estimate the latitude and longitude dependent energy fluxes. The possibility of the estimating of the "eddy" fluxes, the heat and magnetic energy transport provided by small scale motions, is outlined. We give the examples of the estimated heat and magnetic energy flux using the data obtained from MDI-SOHO.
New Eyes to See Inside the Sun and Stars
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