Nonlinear calculation of a radial mode of oscillation of a hot white dwarf

Details Nonlinear calculation of a radial mode of oscillation of a hot white dwarf Nonlinear calculation of a radial mode of oscillation of a hot white dwarf

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..69...61d&link_type=abstract

Astrophysics and Space Science, vol. 69, no. 1, May 1980, p. 61-70.

Astronomy and Astrophysics

Astrophysics

Harmonic Oscillation, Hot Stars, White Dwarf Stars, Nonlinearity, Pulsed Radiation, Stellar Envelopes, Stellar Luminosity, Stellar Mass, Vibration Mode, X Ray Sources

Scientific paper

A linearly unstable first harmonic radial mode of oscillation (period 0.86 s) of a hot white dwarf with a hydrogen envelope is analyzed in the nonlinear regime by application of the Stellingwerf technique to a nonlinear hydrocode. The mass and equilibrium luminosity of the hot white dwarf are 1.3 solar masses, and 1.6 x 10 to the 37th erg/s, respectively. A stable nonlinear mode is found to exist, in which appreciable shock damping occurs at and near the surface - the shock damping being the dominant stabilizing effect. This enhances the possibility that such an object can produce a pulsating X-ray source.

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