Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-05-10
Phys.Rev.D76:042003,2007; Erratum-ibid.D80:129906,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
25 pages, 4 figures; v2: simplified the discussion of aether-matter couplings, removed one extraneous mass vs. pressure plot,
Scientific paper
10.1103/PhysRevD.76.042003
As current and future experiments probe strong gravitational regimes around neutron stars and black holes, it is desirable to have theoretically sound alternatives to general relativity against which to test observations. Here we study the consequences of one such generalization, Einstein-aether theory, for the properties of non-rotating neutron stars. This theory has a parameter range that satisfies all current weak-field tests. We find that within this range it leads to lower maximum neutron star masses, as well as larger surface redshifts at a particular mass, for a given nuclear equation of state. For non-rotating black holes and neutron stars, the innermost stable circular orbit is only slightly modified in this theory.
Eling Christopher
Jacobson Ted
Miller Michael Coleman
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