The Non Radial Oscillations of Condensed Polytropes

Summary. In the adiabatic non radial oscillations of condensed polytropes, the f mode and the first p and g modes show unusual behaviour characterized by the appearance of extra nodes. It is shown that these modes may be interpreted as waves of mixed character, of the internal gravity type in the central regions and of the acoustic type in the external ones. Key words: non radial oscillations condensed polytropes