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arXiv 0802.1704astro-ph
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Kes 75年轻脉冲星的类磁星辐射

Magnetar-like Emission from the Young Pulsar in Kes 75

F. P. Gavriil, M. E. Gonzalez, E. V. Gotthelf, V. M. Kaspi, M. A. Livingstone, P. M. Woods

摘要:

我们报告了在超新星遗迹Kes 75的中心探测到来自年轻脉冲星PSR J1846-0258的类磁星X射线爆发。这颗脉冲星长期以来被认为是旋转驱动的,其表面的偶极磁场为4.9 × 10^13 G,高于绝大多数旋转驱动的磁星,但低于之前发现的12颗磁星。爆发伴随着突然的通量增加和前所未有的时间行为变化。这些现象降低了与类磁星行为相关的磁性和旋转阈值,并表明在中子星中存在连续的磁性活动,其随推断的磁场强度而增加。

英文摘要:

We report detection of magnetar-like X-ray bursts from the young pulsar PSR J1846-0258, at the center of the supernova remnant Kes 75. This pulsar, long thought to be rotation-powered, has an inferred surface dipolar magnetic field of 4.9x10^13 G, higher than those of the vast majority of rotation-powered pulsars, but lower than those of the ~12 previously identified magnetars. The bursts were accompanied by a sudden flux increase and an unprecedented change in timing behavior. These phenomena lower the magnetic and rotational thresholds associated with magnetar-like behavior, and suggest that in neutron stars there exists a continuum of magnetic activity that increases with inferred magnetic field strength.

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