Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-07-20
Acta Astronomica, Vol. 60 (2010), No. 2 pp. 149-163
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Scientific paper
Set of neutron star observational results is used to test some selected equations of state of dense nuclear matter. The first observational result comes from the mass--baryon number relation for pulsar B of the double pulsar system J 0737--3039. The second one is based on the mass--radius relation coming from observation of the thermal radiation of the neutron star RX J 1856.35--3754. The third one follows the population analysis of isolated neutron star thermal radiation sources. The last one is the test of maximum mass. The equation of state of asymmetric nuclear matter is given by the parameterized form of the relativistic Brueckner-Hartree-Fock mean field, and we test selected parameterizations that represent fits of full relativistic mean field calculation. We show that only one of them is capable to pass the observational tests. This equation of state represents the first equation of state that is able to explain all the mentioned observational tests, especially the very accurate test given by the double pulsar even if no mass loss is assumed.
Betak Emil
Stuchlik Zdenek
Urbanec Martin
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