Neutron stars in a Skyrme model with hyperons
Departamento de Física, Universidad de Oviedo, Avda Calvo Sotelo 18, 33007, Oviedo, Spain
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Accepted: 4 March 2005
Published online: 19 April 2005
Available Skyrme parametrizations with hyperons are examined from the point of view of their suitability for applications to neutron stars. It is shown that the hyperons can attenuate or even remove the problem of ferromagnetic instability common to (nearly) all Skyrme parametrizations of the nucleon-nucleon interaction. At high density the results are very sensitive to the choice of the ΛΛ interaction. The selected parameter sets are then used to obtain the resulting properties of both cold neutron stars and hot protoneutron stars. The general features known from other models are recovered.
PACS: 97.60.Jd Neutron stars – / 21.65.+f Nuclear matter – / 21.30.-x Nuclear forces –
© Società Italiana di Fisica and Springer-Verlag, 2005