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arXiv 0908.3813astro-ph.SR
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旋转射电瞬变的定时观测

Timing Observations of Rotating Radio Transients

M. A. McLaughlin, A. G. Lyne, E. F. Keane, M. Kramer, J. J. Miller, D. R. Lorimer, R. N. Manchester, F. Camilo, I. H. Stairs

摘要:

我们提出了无线电定时测量的六个旋转无线电瞬变(RRAT)源发现的帕克斯多波束脉冲星调查。这些提供了四个新的相位连接的定时解决方案和两个更新的解决方案,使原来的11个报告的RRAT中的7个现在具有高精度的旋转和天体测量参数。这七颗RRAT中有三颗的磁场大于10^13 G,其自旋下降特性与磁星和X射线探测到的孤立中子星相似。另外两个这些RRAT有很长的周期和大的特征年龄,并位于附近的无线电脉冲星发射的“死亡线”。剩下的两个RRAT与定时解决方案具有典型的大部分脉冲星人口的属性。新的解决方案提供了对异常排放特性的原因的深入了解。我们证明了RRAT比普通射电暴具有更长的周期和更高的磁场,并且与其他自旋下降参数没有相关性。这些解决方案还提供了精确的位置,这将有助于在高能量下进行后续研究,这对于将这些源与其他中子星种群联系起来至关重要。

英文摘要:

We present radio timing measurements of six rotating radio transient (RRAT) sources discovered in the Parkes Multibeam Pulsar Survey. These provide four new phase-connected timing solutions and two updated ones, making a total of seven of the original 11 reported RRATs now with high-precision rotational and astrometric parameters. Three of these seven RRATs have magnetic fields greater than 10^13 G, with spin-down properties similar to those of the magnetars and X-ray detected isolated neutron stars. Another two of these RRATs have long periods and large characteristic ages, and lie near the `death-line' for radio pulsar emission. The remaining two RRATs with timing solutions have properties typical of the bulk of the pulsar population. The new solutions offer insights into what might be responsible for the unusual emission properties. We demonstrate that the RRATs have significantly longer periods and higher magnetic fields than normal radio pulsars, and find no correlation with other spin-down parameters. These solutions also provide precise positions, which will facilitate follow-up studies at high energies, crucial for relating these sources with other neutron star populations.

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