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arXiv 1102.4870astro-ph.HEastro-ph.SR
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致密天体中子星中心埋藏磁场的演化

Evolution of a buried magnetic field in the central compact object neutron stars

Wynn C. G. Ho

摘要:

中心致密天体是超新星遗迹中心附近新出现的一类年轻中子星。根据X射线定时和光谱测量,它们的磁场被确定为~ 10^10-10^11 G,这明显低于大多数彗星上的磁场。利用最新的电导率和热导率计算,我们求解感应方程来确定埋藏的地壳或地核磁场的演化。我们应用这个模型的一个掩埋场来解释青年和低观测到的磁场的中心紧凑的对象。我们得到的限制,他们的诞生磁场和淹没深度(或吸积质量)。对观测到的磁场强度变化的测量将区分地壳和地核磁场,并可得出唯一的出生磁场和沉没深度。如果我们把中心致密天体看作是一颗在不同时期观测到的中子星,那么我们将诞生时的磁场限制为~(6-9)x10 ^11 G。一个掩埋的磁场也可以解释他们的位置在一个人口不足的区域的自旋周期周期导数平面的双星。

英文摘要:

The central compact objects are a newly-emerging class of young neutron stars near the centre of supernova remnants. From X-ray timing and spectral measurements, their magnetic fields are determined to be ~ 10^10-10^11 G, which is significantly lower than that found on most pulsars. Using the latest electrical and thermal conductivity calculations, we solve the induction equation to determine the evolution of a buried crustal or core magnetic field. We apply this model of a buried field to explain the youth and low observed magnetic field of the central compact objects. We obtain constraints on their birth magnetic field and depth of submergence (or accreted mass). Measurement of a change in the observed magnetic field strength would discriminate between the crustal and core fields and could yield uniquely the birth magnetic field and submergence depth. If we consider the central compact objects as a single neutron star viewed at different epochs, then we constrain the magnetic field at birth to be ~ (6-9)x10^11 G. A buried magnetic field can also explain their location in an underpopulated region of the spin period-period derivative plane for pulsars.

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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