arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0710.1891astro-ph
收藏

是什么让蟹状星云脉冲星发光?

What makes the Crab pulsar shine?

J. A. Eilek, T. H. Hankins

摘要:

我们对蟹状星云脉冲星单个脉冲的高时间分辨率观测表明,主脉冲和间脉冲在时间行为、光谱行为、偏振和色散方面存在差异。脉冲的主要性质与脉冲星射电辐射的一个现有模型一致,即强等离子体湍流中的孤子坍缩。高频间脉冲则完全是另一回事。它的动态频谱不能轻易地用任何电流发射模型来解释;它的过度色散必须来自于通过恒星磁层的传播。我们怀疑高频脉冲并不遵循"标准模型“,而是来自恒星磁层内的一些意想不到的区域。对其他脉冲星的类似观测将揭示蟹状星云脉冲星中的无线电发射机制是否是该恒星独有的,或者可以在一般人群中识别。

英文摘要:

Our high time resolution observations of individual pulses from the Crab pulsar show that the main pulse and interpulse differ in temporal behavior, spectral behavior, polarization and dispersion. The main pulse properties are consistent with one current model of pulsar radio emission, namely, soliton collapse in strong plasma turbulence. The high-frequency interpulse is quite another story. Its dynamic spectrum cannot easily be explained by any current emission model; its excess dispersion must come from propagation through the star's magnetosphere. We suspect the high-frequency interpulse does not follow the ``standard model'', but rather comes from some unexpected region within the star's magnetosphere. Similar observations of other pulsars will reveal whether the radio emission mechanisms operating in the Crab pulsar are unique to that star, or can be identified in the general population.

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。

↑