Hybrid stars that masquerade as neutron stars

Details Hybrid stars that masquerade as neutron stars Hybrid stars that masquerade as neutron stars

2004-11-04

arxiv.org/abs/nucl-th/0411016v2

Astrophys.J. 629 (2005) 969-978

Physics

Nuclear Physics

Nuclear Theory

22 pages, LaTeX. Extra figure and explanation added

Scientific paper

10.1086/430902

We show that a hybrid (nuclear + quark matter) star can have a mass-radius relationship very similar to that predicted for a star made of purely nucleonic matter. We show this for a generic parameterization of the quark matter equation of state, and also for an MIT bag model, each including a phenomenological correction based on gluonic corrections to the equation of state. We obtain hybrid stars as heavy as 2 M_solar for reasonable values of the bag model parameters. For nuclear matter, we use the equation of state calculated by Akmal, Pandharipande, and Ravenhall using many-body techniques. Both mixed and homogeneous phases of nuclear and quark matter are considered.

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