On Modified Dispersion Relations and the Chandrasekhar Mass Limit

Details On Modified Dispersion Relations and the Chandrasekhar Mass Limit On Modified Dispersion Relations and the Chandrasekhar Mass Limit

2008-06-23

arxiv.org/abs/0806.3496v3

Int.J.Mod.Phys.D18:971-982,2009

Astronomy and Astrophysics

Astrophysics

14 pages, 2 figures; v2: version accepted for publication, minor changes; v3: note added correcting comments on the applicabil

Scientific paper

10.1142/S021827180901487X

Modified dispersion relations from effective field theory are shown to alter the Chandrasekhar mass limit. At exceptionally high densities, the modifications affect the pressure of a degenerate electron gas and can increase or decrease the mass limit, depending on the sign of the modifications. These changes to the mass limit are unlikely to be relevant for the astrophysics of white dwarf or neutron stars due to well-known dynamical instabilities that occur at lower densities. Generalizations to frameworks other than effective field theory are discussed.

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