Effect of hyperons on the physical properties of neutron stars

Details Effect of hyperons on the physical properties of neutron stars Effect of hyperons on the physical properties of neutron stars

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cha%26a..10...30l&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 10, Issue 1, p. 30-33.

Astronomy and Astrophysics

Astrophysics

Scientific paper

In this paper we generalize Walecka's (1974) mean field model to include the case of all the baryons in the eightfold state. We discuss the effect of hyperons and the physical properties of cool neutron stars. A general theoretical result is given without presupposing the SU(3) symmetry, and numerical calculation was made on assuming the SU(3) symmetry. When ρ = 4.43(+14) g/cm3, hyperons begin to appear; their effect is to soften the equation of state by about 8%. We obtained the following values: maximum mass of a neutron star, 2.37 M; the corresponding radius, 11.1 km; rotational inertia, 4.3 (+45) g cm2; central density, 2.32 (+15) g/cm3.

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