Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97...16d&link_type=abstract
Astronomy and Astrophysics, vol. 97, no. 1, Apr. 1981, p. 16-26.
Astronomy and Astrophysics
Astrophysics
76
Stellar Envelopes, Stellar Gravitation, Stellar Models, Stellar Oscillations, Variable Stars, White Dwarf Stars, Abundance, Carbon, Chemical Elements, Gravitational Effects, Helium, Hydrogen, Spherical Harmonics, Stellar Temperature
Scientific paper
The vibrational instability of white dwarf models is investigated, taking into account effects of gravitational separation of elements. It is pointed out that the models consist of a carbon core, helium zone, and hydrogen outer layer separated by transition regions, the abundance profile being determined by the diffusion equilibrium. It is found that in the range of effective temperatures corresponding to the observed range for ZZ Ceti stars, the models are unstable against gravity modes when the total mass of hydrogen is less than approximately 1.2 x 10 to the -13 solar mass. The unstable modes are found to correspond to low order spherical harmonics in the period range 100-1200 sec.
Dziembowski Wojciech
Koester Detlev
No associations
LandOfFree
Excitation of gravity modes in white dwarfs with chemically stratified envelopes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Excitation of gravity modes in white dwarfs with chemically stratified envelopes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excitation of gravity modes in white dwarfs with chemically stratified envelopes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-780940