Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations

Fast neutrino cooling of nuclear pasta in neutron stars: Molecular dynamics simulations
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中子星中核意大利面的快速中微子冷却:分子动力学模拟

DOI:
10.1103/physrevc.102.045801
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发表时间:
2020
期刊:
影响因子:
3.1
通讯作者:
Lunardini, Cecilia
Lunardini, Cecilia
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lin, Zidu;Caplan, Matthew E.;Horowitz, Charles J.;Lunardini, Cecilia

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快速中微子发射的直接乌卡过程可能发生在中子星内壳中预期的不均匀核面相中。在这里,核面食中核子的周期性势使得直接乌尔卡反应能够满足动量守恒。我们通过大规模分子动力学模拟对丰富多样的面食相(面疙瘩、华夫饼、烤宽面条和反意大利面)进行建模,从而改进了早期的工作。我们发现,核面食中直接 Urca 反应产生的中微子光度比 NS 核心中改进的 Urca 过程产生的中微子光度大 3 到 4 个数量级。因此,来自面食的中微子辐射可能会主导来自核心的辐射,这可能会显着影响中子星的冷却。
The direct Urca process of rapid neutrino emission can occur in nonuniform nuclear pasta phases that are expected in the inner crusts of neutron stars. Here, the periodic potential for a nucleon in nuclear pasta allows momentum conservation to be satisfied for direct Urca reactions. We improve on earlier work by modeling a rich variety of pasta phases (gnocchi, waffle, lasagna, and anti-spaghetti) with large-scale molecular dynamics simulations. We find that the neutrino luminosity due to direct Urca reactions in nuclear pasta can be 3 to 4 orders of magnitude larger than that from the modified Urca process in the NS core. Thus neutrino radiation from pasta could dominate radiation from the core and this could significantly impact the cooling of neutron stars.
中子星地幔中的体积粘度
DOI: --
发表时间: 2018
影响因子: 4.8
作者:
D. Yakovlev;M. Gusakov;P. Haensel
通讯作者: P. Haensel
拓扑缺陷对“核意大利面”可观测量的影响
DOI: 10.1103/physrevc.93.065806
发表时间: 2016
期刊: Physical Review C
影响因子: 3.1
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