Hybrid neutron stars with the Dyson-Schwinger quark model and various quark-gluon vertices
Hybrid neutron stars with the Dyson-Schwinger quark model and various quark-gluon vertices
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具有戴森-施温格夸克模型和各种夸克-胶子顶点的混合中子星
DOI:
10.1103/physrevd.91.105002
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发表时间:
2015-03
影响因子:
5
通讯作者:
Schulze H.-J.
中科院分区:
文献类型:
--
作者:
Wei Jin-Biao;Baldo M.;Burgio G. F.;Schulze H.-J.
We study cold dense quark matter and hybrid neutron stars with a Dyson-Schwinger quark model and various choices of the quark-gluon vertex. We obtain the equation of state of quark matter in beta equilibrium and investigate the hadron-quark phase transition in combination with a hadronic equation of state derived within the Brueckner-Hartree-Fock many-body theory. Comparing with the results for quark matter with the rainbow approximation, the Ball-Chiu ansatz and the 1BC ansatz for the quark-gluon vertex lead to a reduction of the effective interaction at finite chemical potential, qualitatively similar to the effect of our gluon propagator. We find that the phase transition and the equation of state of the quark or mixed phase and consequently the resulting hybrid star mass and radius depend mainly on a global reduction of the effective interaction due to effects of both the quark-gluon vertex and gluon propagator, but are not sensitive to the vertex ansatz.
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DOI:
10.1017/cbo9781139207249.009
发表时间:
2012
期刊:
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影响因子:
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DOI:
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发表时间:
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影响因子:
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P. P. Sipiera-P.
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通讯作者:
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