STRUCTURES OF THE VELA PULSAR AND THE GLITCH CRISIS FROM THE BRUECKNER THEORY
STRUCTURES OF THE VELA PULSAR AND THE GLITCH CRISIS FROM THE BRUECKNER THEORY
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DOI：
10.3847/0067-0049/223/1/16
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
A. Li;J. Dong;J. B. Wang;R. Xu
中科院分区：
文献类型：
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作者：
A. Li;J. Dong;J. B. Wang;R. Xu
船帆座脉冲星（PSR B0833-45，周期为89.33 ms）的详细结构采用了一种基于现代微观Brueckner-Hartree-Fock计算的中子星的所有部分：外地壳、内地壳和核心的统一处理方法。选取质量在1.0 ~ 2.0 M⊙的脉冲星，计算其中心密度、核/壳半径、核/壳质量、核/壳厚度、转动惯量和转动惯量。其中，地壳转动惯量可以有效地从累积的故障观测中得到约束，这在最近引起了很大的争论，被称为“故障危机”。也就是说，在标准双分量模型中被认为是小故障起源的地壳内部的超流中子可能大量被夹带在原子核晶格中，然后可能没有足够的超流中子（比以前的值少4/5）来触发船帆脉冲星的大故障（Δν/ν0 ~ 10−6）。通过将故障观测与地壳转动惯量的理论计算相比较，我们发现，尽管最近有人反对危机论，但故障危机仍然存在，这意味着除了地壳超流体中子之外，核心中子可能是解释船帆座脉冲星大故障的必要条件。
Detailed structures of the Vela pulsar (PSR B0833-45, with a period of 89.33 ms) are predicted by adopting a recently constructed unified treatment of all parts of neutron stars: the outer crust, the inner crust, and the core based on modern microscopic Brueckner–Hartree–Fock calculations. Taking a pulsar mass in the range from 1.0 to 2.0 M⊙, we calculate the central density, the core/crust radii, the core/crustal mass, the core/crustal thickness, the moment of inertia, and the crustal moment of inertia. Among them, the crustal moment of inertia could be effectively constrained from the accumulated glitch observations, which has been a great debate recently, known as the “glitch crisis.” Namely, superfluid neutrons contained in the inner crust, which are regarded as the origin of the glitch in the standard two-component model, could be largely entrained in the nuclei lattices, and then there may not be enough superfluid neutrons (∼4/5 less than the previous value) to trigger the large glitches (Δν/ν0 ∼ 10−6) in the Vela pulsar. By confronting the glitch observations with the theoretical calculations for the crustal moment of inertia, we find that despite some recent opposition to the crisis argument, the glitch crisis is still present, which means that besides the crustal superfluid neutrons, core neutrons might be necessary for explaining the large glitches of the Vela pulsar.