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Glitch Crisis or Not: a Microscopic Study
Li, A; Li, A (reprint author), Xiamen Univ, Dept Astron, Xiamen 361005, Peoples R China.
2015
发表期刊CHINESE PHYSICS LETTERS
卷号32期号:7页码:79701
文章类型Article
摘要The problem of glitch crisis has been a great deal of debate recently. It might challenge the standard two-component model, where glitches are thought to be triggered by the sudden unpinning of superfluid vortices in the neutron-star crust. It says that due to crustal entrainment the amount of superfluid in the crust cannot explain the changes in angular momentum required to account for the glitches. However, the argument of this crisis is based on the assumption that the core superfluid is completely coupled to the crust when a glitch happens. The fraction of the coupled core part is actually a quite uncertain problem so far. In this work, we take three possible values for the fraction of the coupled core part and study in detail the crisis problem for a 1.4M(circle dot). canonical star, based on a microscopic equation of state for the neutron star's core using the Brueckner-Hartree-Fock approach. For this purpose, two requisite parameters are chosen as follows: the core-crust transition pressure is in the range of P-t = 0.2-0.65 MeV/fm(3), and the fractional crust radius Delta R/R = 0.082 based on experiments. To account for the possibility of a heavier star, a larger value of Delta R/R = 0.15 is also chosen for comparison. Then we take the crustal entrainment into account, and evaluate the predictions for the fractional moment of inertia at various conditions. The results show that there is commonly no such glitch crisis, as long as one considers only a small fraction of the core neutron superfluid will contribute to the charged component of the star. Only if the core-crust transition pressure is determined to be a low value, the crisis problem may appear for complete core-crust coupling. This is consistent with a recent study in a phenomenological model.
学科领域Physics
资助者National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107]
DOIhttp://dx.doi.org/10.1088/0256-307X/32/7/079701
关键词[WOS]PULSAR
收录类别SCI
语种英语
资助者National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107] ; National Natural Science Foundation of China [U1431107]
WOS类目Physics, Multidisciplinary
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/20942
专题理论物理所SCI论文
通讯作者Li, A (reprint author), Xiamen Univ, Dept Astron, Xiamen 361005, Peoples R China.
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Li, A,Li, A . Glitch Crisis or Not: a Microscopic Study[J]. CHINESE PHYSICS LETTERS,2015,32(7):79701.
APA Li, A,&Li, A .(2015).Glitch Crisis or Not: a Microscopic Study.CHINESE PHYSICS LETTERS,32(7),79701.
MLA Li, A,et al."Glitch Crisis or Not: a Microscopic Study".CHINESE PHYSICS LETTERS 32.7(2015):79701.
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