论文标题
单一和多组分中子星形地壳中的结晶
Crystallization in single and multicomponent Neutron Star crusts
论文作者
论文摘要
我们使用分子动力学模拟来研究中子恒星外壳中单个和多组分晶格的形成和稳定性。包括改进的离子高斯电荷分布的处理方法，我们获得了使用有效的ewald sum程序，通过电子筛选库仑相互作用产生的电势和力的表达式。等离子体中的％。我们的发现表明，对于外壳中的巴属密度，点状的离子处理无法完全描述结晶行为，因此库仑参数$γ_c$，以及通常的筛选参数，$κ$，由于电荷中和中和电子的可超极化背景，必须与其他参数，$η$ qual nimite Insportife nimite consection nimite consectionallized temallizatized Electron。在我们的方法中，我们发现在筛选的等离子体中包括超出点状方法对计算出的晶格能量稳定性降低了每巴属的结晶能，而对于点状的相互作用，最高可达$ \ sim 40 \％$，并且结果是，融化的点导致温度降低。
We use Molecular Dynamics simulations to study the formation and stability of single and multicomponent lattices in the outer crust of Neutron Stars. Including an improved treatment for Gaussian charge distributions of ions we obtain the expressions for the potential and forces arising from electron screened Coulomb interactions using the efficient Ewald sum procedure. %in the plasma. Our findings show that for baryon densities in the outer crust a point-like ion treatment can not fully describe the crystallization behaviour thus the Coulomb parameter, $Γ_C$, along with the usual screening parameter, $κ$, due to charge neutralizing electron polarizable background, must be complemented with an additional parameter, $η$, providing information on the finite size of ions. In our approach we find that including beyond point-like approaches in screened plasmas has a robust impact on calculated lattice energetic stability decreasing crystallization energies per baryon up to $\sim 40\%$ with respect to point-like interaction and, as a consequence, melting point resulting displaced to lower temperatures.
