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Influences of Both Δ? and Δ0 Particles on the Neutron Star Cooling |
| DING Wen-Bo1**, LI Ying1, MI Geng2 |
1College of Mathematics and Physics, Bohai University, Jinzhou 121000
2College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121000 |
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| Cite this article: |
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DING Wen-Bo, LI Ying, MI Geng 2012 Chin. Phys. Lett. 29 092601 |
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Abstract The influences of Δ quartet, especially Δ? and Δ0 particles, on the neutrino scatting and cooling properties of neutron stars are discussed. The results show that Δ quartet can change the density range of direct Urca process of nucleons for muons, as well as the neutrino emissivity and luminosity. The role of Δ on the cooling rates is complicated. It is found that Δ quartet slows the neutron star cooling obviously in hyperonic neutron star matter. However in nuclear matter, Δ can not influence the cooling too much, unless the neutron star is quite massive. The Δ-meson coupling constants can also impact on the results, and the relatively smaller value, the stronger effects of Δ quartet.
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Received: 06 February 2012
Published: 01 October 2012
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