Differential asymptotic sound-speed inversions

Abstract

An asymptotic method for determining the internal solar sound speed from the differences between observed p-mode frequencies and those of a standard reference solar model is presented. In order to test the method, it has been applied to the frequency differences between pairs of solar models, where in each case one takes the part of the reference model and the other the role of the sun. The results of these numerical experiments indicate that by using this simple method one may in principle be able to determine the sound speed from the energy-generating core to the helium ionization zone.