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Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions

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arxiv nucl-th/0602038 v1 pith:WOLOLGYA submitted 2006-02-13 nucl-th astro-phhep-ph

Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions

T. Klahn , D. Blaschke , S. Typel , E.N.E. van Dalen , A. Faessler , C. Fuchs , T. Gaitanos , H. Grigorian
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A. Ho E.E. Kolomeitsev M.C. Miller G. Ropke J. Trumper D.N. Voskresensky F. Weber H.H. Wolter
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classification nucl-th astro-phhep-ph
keywords constraintscollisionsheavy-ionmassnuclearcompactdataesos
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A new scheme for testing nuclear matter equations of state (EsoS) at high densities using constraints from neutron star phenomenology and a flow data analysis of heavy-ion collisions is suggested. An acceptable EoS shall not allow the direct Urca process to occur in neutron stars with masses below $1.5~M_{\odot}$, and also shall not contradict flow and kaon production data of heavy-ion collisions. Compact star constraints include the mass measurements of 2.1 +/- 0.2 M_sun (1 sigma level) for PSR J0751+1807, of 2.0 +/- 0.1 M_sun from the innermost stable circular orbit for 4U 1636-536, the baryon mass - gravitational mass relationships from Pulsar B in J0737-3039 and the mass-radius relationships from quasiperiodic brightness oscillations in 4U 0614+09 and from the thermal emission of RX J1856-3754. This scheme is applied to a set of relativistic EsoS constrained otherwise from nuclear matter saturation properties with the result that no EoS can satisfy all constraints simultaneously, but those with density-dependent masses and coupling constants appear most promising.

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Cited by 2 Pith papers

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  1. A self-consistent single-fluid framework for neutron stars admixed with mirror dark matter

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    Mirror dark matter admixture via mutual mean-field shifts softens the nuclear EOS, raises central densities, lowers maximum masses, and moves the direct Urca onset to higher or lower masses depending on symmetry-energ...

  2. Strongly interacting matter with criticality induced by modified excluded volume in core-collapse supernova simulations

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