Abstract
The difference of the moment of inertia of the neutron star PSR J0348+0432 and that of its proto neutron star is studied in the framework of the relativistic mean field theory considering baryon octet. The temperature of the proto neutron star PSR J0348+0432 is chosen as \(T=5~\mbox{MeV}\). The calculations show that the central baryon number density of the proto neutron star PSR J0348+0432 is in the range \(0.623\sim 0.813~\mbox{fm}^{-3}\), decreased by \(2\sim 7\%\) compared to that of the neutron star PSR J0348+0432. The radius of the proto neutron star PSR J0348+0432 is in the range \(13.101\sim 12.419~\mbox{km}\), increased by \(1\sim 2\%\) compared to that of the neutron star PSR J0348+0432. The moment of inertia of the proto neutron star PSR J0348+0432 is in the range \(1.939\times 10^{45}\sim 1.638\times 10^{45}~\mbox{g}\,\mbox{cm}^{2}\), increased by about \(2 \sim 7\%\) compared to that of the neutron star PSR J0348+0432.
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Acknowledgements
We are thankful to Shan-Gui Zhou for fruitful discussions during my visit to the Institute of Theoretical Physics, Chinese Academy of Sciences. This work was supported by the Natural Science Foundation of China (Grant No. 11447003) and the Scientific Research Foundation of the Higher Education Institutions of Anhui Province, China (Grant No. KJ2014A182).
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Zhao, XF. The moment of inertia of the neutron star PSR J0348+0432 and its proto neutron star. Astrophys Space Sci 362, 95 (2017). https://doi.org/10.1007/s10509-017-3073-4
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DOI: https://doi.org/10.1007/s10509-017-3073-4