Hybrid Stars that Masquerade as Neutron Stars
Mark AlfordPhysics Department, Washington University, Compton Hall, 1 Brookings Drive, Campus Box 1105, St. Louis, MO 63130Matt BrabyPhysics Department, Washington University, Compton Hall, 1 Brookings Drive, Campus Box 1105, St. Louis, MO 63130Mark ParisAffiliated with the Theoretical Division of Los Alamos National Laboratory for part of the work reported hereSanjay ReddyTheoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545
2005en
ABI
Аннотация
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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