Iw. Roxburgh et Sv. Vorontsov, THE ASYMPTOTIC THEORY OF STELLAR ACOUSTIC-OSCILLATIONS - A 4TH-ORDER APPROXIMATION FOR LOW-DEGREE MODES, Monthly Notices of the Royal Astronomical Society, 268(1), 1994, pp. 143-158
The asymptotic description of low-degree stellar acoustic modes is ext
ended to fourth order in inverse powers of the cyclical frequency. The
accuracy of the asymptotic approximation is tested by comparing the p
redicted values of the eigenfrequencies and the 'small frequency separ
ations' with those calculated by solving the full equations governing
the adiabatic oscillations of a standard solar model.