The g-modes of white dwarfs.
Abstract
The neutral g-modes of a degenerate fluid at zero temperature are analyzed. The g-modes of a degenerate fluid at finite but small temperatures are then expanded in terms of those of the zero temperature fluid. For nonrelativistic degenerate fluids it is found that (1) the g-eigenvalues are proportional to T mu(6)sub e mu(-1)sub i, where T is the internal temperature of the fluid, mue and mui are the mean molecular weights of electrons and ions, respectively; (2) the ion pressure is solely responsible for driving the g-modes. For white dwarfs of about a solar mass, the periods of the g-oscillations are in the range of a few hundredths of seconds.
- Publication:
-
Current Problems in Stellar Pulsation Instabilities
- Pub Date:
- May 1980
- Bibcode:
- 1980cpsp.book..513S
- Keywords:
-
- Astrophysics;
- Stellar Luminosity;
- Variable Stars;
- White Dwarf Stars;
- Adiabatic Equations;
- Degeneration;
- Equations Of Motion;
- Isothermal Processes;
- Periodic Variations;
- Rayleigh-Ritz Method;
- Stellar Mass;
- Stellar Models;
- Stellar Temperature;
- Astrophysics;
- Oscillations:White Dwarfs;
- Periods:White Dwarfs