Abstract
The influence of the hyperon coupling constants on the moment of inertia of a proto neutron star has been investigated within the framework of relativistic mean field theory for the baryon octet {n,p,Λ,Σ − ,Σ0,Σ + ,Ξ − ,Ξ0} system. It is found that for a proto neutron star, the mass, the moment of inertia and their own maximum values as a function of radius R or M/R are all more sensitive to the hyperon coupling constants. For all the different hyperon coupling constants mentioned, the case of no hyperons corresponds to the largest moment of inertia.
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Acknowledgements
We are thankful to the anonymous referee for many useful comments and suggestions. This work was supported by the Anhui Provincial Natural Science Foundation under grant 1208085MA09, the Natural Science Research Program Foundation of Institutions of Higher Education of Anhui Province under grant KJ2012Z297 and the Fundamental Research Funds for the Central Universities under grant SWJTU12ZT11.
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Zhao, XF., Jia, HY. Constraints on the Moment of Inertia of a Proto Neutron Star from the Hyperon Coupling Constants. J Astrophys Astron 33, 303–310 (2012). https://doi.org/10.1007/s12036-012-9147-3
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DOI: https://doi.org/10.1007/s12036-012-9147-3