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von Zeipel theorem farbin-e von Zeipel Fr.: théorème de von Zeipel A theorem that establishes a relation between the → gravity darkening coefficient.
As a consequence, the stellar surface will not be uniformly
bright, because there is a much larger flux and a higher
→ effective temperature at the pole than at
the equator (T,
where β is the → _{eff} (θ) ∝ g_{eff} (θ)^{β}gravity darkening exponent.
In → massive stars this latitudinal dependence
of the temperature leads to asymmetric → mass loss and
also to enhanced average → mass loss rates.
Also called → gravity darkening.
See also → von Zeipel paradox;
→ meridional circulation; → baroclinic instability;
→ Eddington-Sweet time scale.Named for Edvard Hugo von Zeipel, Swedish astronomer (1873-1959), who published
his work in 1924 (MNRAS 84, 665); → |