High-density QCD pairing in compact star structure

Details High-density QCD pairing in compact star structure High-density QCD pairing in compact star structure

2002-11-29

arxiv.org/abs/astro-ph/0211638v3

Astron.Astrophys.403:173-178,2003

Astronomy and Astrophysics

Astrophysics

6 pages, 7 figures, to appear in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20030374

Strange quark matter in a color flavor locked (CFL) state can be the true ground state of hadronic matter for a much wider range of the parameters of the model (the gap of the QCD Cooper pairs $\Delta$, the strange quark mass $m_s$ and the Bag Constant $B$) than the state without any pairing. We review the equation of state (EOS) of CFL strange matter and study the structure of stellar objects made up of this phase, highlighting the novel features of the latter. Although the effects of pairing on the equation of state are thought to be small, we find that CFL stars may be in fact much more compact than strange stars (SS). This feature may be relevant in view of some recent observation claiming the existence of exotic and/or deconfined phases in some nearby neutron stars (NS).

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