White Dwarfs with Anisotropic Pressure in Postnewtonian Gravity

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

The theory of equilibrium of nonrotating, spherically symmetric neutron stars and white dwarfs is revisited. We propose that the condition for equilibrium is that the total energy is a minimum, for given baryon number, amongst configurations fulfilling Einstein's equations. The isotropy of the stress tensor is not assumed 'a priori'. Using this condition it is shown that, in post-Newtonian gravity, there are equilibrium configurations of white dwarfs, with local anisotropy, having mass above the Chandrasekhar limit.

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