Hybrid stars with the Dyson-Schwinger quark model

G. F. Burgio; H. Chen; H.-J. Schulze; (INFN Sezione di Catania; Italy); M. Baldo

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arxiv 1107.2497 v2 pith:UJZAC2HO submitted 2011-07-13 nucl-th astro-ph.SRhep-ph

Hybrid stars with the Dyson-Schwinger quark model

H. Chen , M. Baldo , G. F. Burgio , H.-J. Schulze , (INFN Sezione di Catania , Italy) This is my paper

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keywords dyson-schwingermodelequationhadron-quarkhybridhyperonsneutrononly

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We study the hadron-quark phase transition in the interior of neutron stars. For the hadronic sector, we use a microscopic equation of state involving nucleons and hyperons derived within the Brueckner-Hartree-Fock many-body theory with realistic two-body and three-body forces. For the description of quark matter, we employ the Dyson-Schwinger approach and compare with the MIT bag model. We calculate the structure of neutron star interiors comprising both phases and find that with the Dyson-Schwinger model, the hadron-quark phase transition takes place only when hyperons are excluded, and that a two-solar-mass hybrid star is possible only if the nucleonic equation of state is stiff enough.

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Cooling of Hybrid Stars with a 2SC+$<dd>$ Phase
nucl-th 2026-06 unverdicted novelty 7.0

Hybrid stars containing the 2SC+<dd> phase cool more slowly than those with the 2SC phase because inherited 3P2 superfluidity suppresses quark beta decay, producing cooling curves close to the CFL case.