Hyperstars: phase transition to (meta)-stable hyperonic matter in neutron stars

Recent progress in the understanding of the high density phase of neutron stars advances the view that a substantial fraction of the matter consists of hyperons. The possible impacts of a highly attractive interaction be
Recent progress in the understanding of the high density phase of neutron stars advances the view that a substantial fraction of the matter consists of hyperons. The possible impacts of a highly attractive interaction between hyperons on the properties of compact stars is investigated. We find that the equation of state exhibits a second stable minimum at large hyperon contents which is in accord with existing hypernuclear data. This second solution gives rise to new effects for neutron star properties which are similar to the ones proposed for the deconfinement transition to strange quark matter and absolutely stable strange stars. We find that the corresponding hyperstars can have rather small radii of R=6-8 km independent of the mass. PACS: 26.60+c, 21.65+f, 97.60.Gb, 97.60.Jd
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Metadaten
Author:Jürgen Schaffner-Bielich, Matthias Hanauske, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-22087
Document Type:Preprint
Language:English
Date of Publication (online):2005/11/22
Year of first Publication:2000
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/11/22
Source:http://www.arxiv.org/abs/astro-ph/0005490v1, s.a. spätere Versionen unter dem Titel: "Phase transition to hyperon matter in neutron stars"
HeBIS PPN:185506151
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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