The role of magnetic field decay in normal radio pulsars is still debated. In this paper, we present results which demonstrate that an episode of magnetic field decay in hot young neutron stars can explain anomalous values of braking indices recently measured for more than a dozen of sources. It is enough to have few tens of per cent of such hot neutron stars in the total population to explain observables. Relatively rapid decay operates at ages ≲ few ×100 kyrs with a characteristic timescale of a similar value. We speculate that this decay can be related to electron scattering off phonons in neutron star crusts. This type of decay saturates as a neutron star cools down. Later on, a much slower decay due to crustal impurities dominates. Finally, we demonstrate that this result is in agreement with our early studies.

中文翻译：

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年轻无线电脉冲星的磁场衰减

磁场在普通无线电脉冲星中的作用仍在争论中。在本文中，我们提供的结果表明，在热的年轻中子星中发生的磁场衰减事件可以解释最近为十多个来源测量的制动指数异常值。在总人口中只有几十％的此类热中子星足以解释可观察到的东西。相对迅速衰减的年龄经营≲数×100具有类似值的特征时间刻度的kyrs。我们推测这种衰变可能与电子从中子星地壳中的声子上的声子散射有关。当中子星冷却时，这种衰减会饱和。后来，由地壳杂质引起的衰变要慢得多。最后，我们证明了这一结果与我们的早期研究相符。