| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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Effects of Gravitational Correction on Neutrino Emission from Neutron Stars |
| DING Wen-Bo1**, E Shan-Shan1, YU Zi2, ZHANG Qi1, QI Zhan-Qiang1 |
1School of Mathematics and Physics, Bohai University, Jinzhou 121000
2College of Science, Nanjing Forestry University, Nanjing 210037
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| Cite this article: |
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DING Wen-Bo, E Shan-Shan, YU Zi et al 2015 Chin. Phys. Lett. 32 059701 |
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Abstract Considering the gravitational correction through introduction of weakly interacting light vector U bosons, not only the equation of state (EoS) of the neutron star matter, but also the cooling properties of neutron stars may be changed. In this work, effects of gravitational correction on neutrino emission and cooling of neutron stars in the matter with neutrons, protons, electrons, muons, Δ? and Δ0 are studied by the relativistic mean field theory and the related cooling theory. The results show that the effects are sensitive to the ratio of coupling strength to mass squared of U bosons, defined as gU. With increasing gU, the radial region where direct Urca process of nucleons can be allowed in a neutron star with the fixed mass becomes narrower, while the neutrino emissivity is somewhat higher. Moreover, the gravitational correction suppresses the effects of Δ? on neutrino emission. The gravitational correction leads the star to cool faster, and the higher the gU is, the faster the star cools.
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Received: 26 December 2014
Published: 01 June 2015
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[1] Fayet P 2010 Phys. Rev. D 81 054025
[2] Zhu S H 2007 Phys. Rev. D 75 115004
[3] Hoyle C D 2003 Nature 421 899
[4] DeDeo S and Psaltis D 2008 Phys. Rev. D 78 064013
[5] Geraci A A, Papp S B and Kitching J 2010 Phys. Rev. Lett. 105 101101
[6] Lucchesi D M and Person R 2010 Phys. Rev. Lett. 105 231103
[7] Wen D H, Li B A and Chen L W 2009 Phys. Rev. Lett. 103 211102
[8] Krivoruchenko M I, ?imkovic F and Faessler A 2009 Phys. Rev. D 79 125023
[9] Zhang D R, Yin P L, Wang W et al 2011 Phys. Rev. C 83 035801
[10] Zheng H and Chen L W 2012 Phys. Rev. D 85 043013
[11] Demorest P B, Pennucci T, Ransom S M et al 2010 Nature 467 1081
[12] Ding W B, Liu G Z, Zhu M F et al 2008 Chin. Phys. Lett. 25 458
[13] Ding W B, Li Y and Mi G 2012 Chin. Phys. Lett. 29 092601
[14] Fujii Y 1971 Nature 234 5
[15] Lattimer J M, Pethick C J and Prakash M 1991 Phys. Rev. Lett. 66 2701
[16] Barret D, Olive J F and Miller M C 2005 Mon. Not. R. Astron. Soc. 361 855
[17] ?zel F 2006 Nature 441 1115 |
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