Parameters of rotating neutron stars with and without hyperons. (arXiv:1212.2369v1 [astro-ph.SR]):
The discovery of a 2 Msun neutron star provided a robust constraint for the
theory of exotic dense matter, questioning the existence of strange baryons in
the interiors of neutron stars. With many theories failing to reproduce this
observational result, several equations of state containing hyperons are
consistent with it. We study global properties of stars using equations of
state containing hyperons, and compare them to those without hyperons in order
to find similarities, differences and limits that can be compared with the
astrophysical observations. Rotating, axisymmetric and stationary stellar
configurations in General Relativity are obtained, and their global parameters
are studied. Approximate formulae describing the behavior of the maximum and
minimum stellar mass, compactness, surface redshifts and moments of inertia as
functions of spin frequency are provided. We also study the thin disk accretion
and compare the spin-up evolution of stars with different moments of inertia.
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