Shear viscosity and thermal conductivity of nuclear "pasta"

被引:46
作者
Horowitz, C. J. [1 ,2 ]
Berry, D. K. [3 ]
机构
[1] Indiana Univ, Ctr Nucl Theory, Bloomington, IN 47405 USA
[2] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[3] Indiana Univ, Univ Informat Technol Serv, Bloomington, IN 47408 USA
来源
PHYSICAL REVIEW C | 2008年 / 78卷 / 03期
关键词
D O I
10.1103/PhysRevC.78.035806
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We calculate the shear viscosity eta and thermal conductivity kappa of a nuclear pasta phase in neutron star crusts. This involves complex nonspherical shapes. We use semiclassical molecular dynamics simulations involving 40,000 to 100,000 nucleons. The viscosity eta can be simply expressed in terms of the height Z* and width Delta q of the peak in the static structure factor S-p(q). We find that eta increases somewhat, compared to a lower density phase involving spherical nuclei, because Z* decreases from form factor and ion screening effects. However, we do not find a dramatic increase in eta from nonspherical shapes, as may occur in conventional complex fluids.
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页数:8
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