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arXiv 1507.07962astro-ph.HE
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正常射电望远镜中的磁场衰减

Magnetic field decay in normal radio pulsars

A. P. Igoshev, S. B. Popov

摘要:

本文分析了我们在最近的研究中发现的正常射电望远镜中磁场衰减的原因。这种衰减具有典型的时间尺度$\sim 4 \times 10^5$ ~yrs,并在$\sim 10^5$ ~--~几个$\times 10^5$ ~ yrs范围内工作.我们证明这种场的演化可能是由于与声子散射有关的欧姆衰减,也可能是由于到达霍尔吸引子的霍尔级联.根据我们的分析,第一种可能性似乎更可靠。因此,我们把所发现的场衰减主要归因于声子的欧姆衰减,当NS冷却到临界温度时,声子的欧姆衰减在$\times 10^5$ ~yrs的年龄达到饱和,在该温度以下,声子散射对地壳的电阻率没有多大贡献。不排除霍尔效应和吸引子的某些作用,并将在我们的进一步研究中进行分析。

英文摘要:

We analyse the origin of the magnetic field decay in normal radio pulsars found by us in a recent study. This decay has a typical time scale $\sim 4 \times 10^5$~yrs, and operates in the range $\sim 10^5$~--~few$\times 10^5$~yrs. We demonstrate that this field evolution may be either due to the Ohmic decay related to the scattering from phonons, or due to the Hall cascade which reaches the Hall attractor. According to our analysis the first possibility seems to be more reliable. So, we attribute the discovered field decay mainly to the Ohmic decay on phonons which is saturated at the age few$\times 10^5$~yrs, when a NS cools down to the critical temperature below which the phonon scattering does not contribute much to the resistivity of the crust. Some role of the Hall effect and attractor is not excluded, and will be analysed in our further studies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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