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arXiv 1502.00677astro-ph.HE
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厘米波段蟹状星云脉冲星:I.包围特性

The Crab Pulsar at Centimeter Wavelengths: I. Ensemble Characteristics

T. H. Hankins, G. Jones, J. A. Eilek

摘要:

我们对蟹状星云中的脉冲星进行了高射频和高时间分辨率的观测。我们提出了连续采样的数据在640纳秒的时间分辨率,和个人的明亮的脉冲记录在0.25纳秒的时间分辨率。将我们的新数据与我们小组和文献中的先前数据相结合,显示了脉冲星的无线电发射在低和高射频之间的巨大变化。在约5GHz以下,平均轮廓由明亮的主脉冲和低频间脉冲主导。然而,在5 GHz以上,一切都发生了变化;主脉冲消失了,蟹状星云脉冲星的平均轮廓由高频脉冲间(与低频脉冲完全不同)和两个高频分量主导。我们提出了详细的观测特征,这些不同的组件,未来的模型的脉冲星的磁层必须解释。

英文摘要:

We have observed the pulsar in the Crab Nebula at high radio frequencies and high time resolution. We present continuously sampled data at 640-ns time resolution, and individual bright pulses recorded at down to 0.25-ns time resolution. Combining our new data with previous data from our group and from the literature shows the dramatic changes in the pulsar's radio emission between low and high radio frequencies. Below about 5 GHz the mean profile is dominated by the bright Main Pulse and Low-Frequency Interpulse. Everything changes, however, above about 5 GHz; the Main Pulse disappears, the mean profile of the Crab pulsar is dominated by the High-Frequency Interpulse (which is quite different from its low-frequency counterpart) and the two High-Frequency Components. We present detailed observational characteristics of these different components which future models of the pulsar's magnetosphere must explain.

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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