Thermal Waves and Unstable Convection in ZZ Ceti Stars

Details Thermal Waves and Unstable Convection in ZZ Ceti Stars Thermal Waves and Unstable Convection in ZZ Ceti Stars

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001oap....14..141f&link_type=abstract

Odessa Astronomical Publications, 14, 141-143

Astronomy and Astrophysics

Astronomy

Stars: Interiors, Zz Ceti: Convection, Stability

Scientific paper

We analyze the stability criteria by convection in ZZ ceti stars when the thermal relaxation times are not negligible. Using the Cattaneo law and the Mixing Length Theory in the degenerate regimen, is shown that the heat flux can be propagated by thermal waves and predicts quasi periodic pulses in luminosity. This formalism is consistent with the semi-analytically approaches to temperature variations and several ZZ ceti light curves.

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