脉冲星射电辐射束半径与周期关系的研究

发布时间：2018-01-22 02:20

本文关键词： 脉冲星普通方法统计　出处：《天文学报》2014年06期 　论文类型：期刊论文

【摘要】：脉冲星的周期非常稳定.前人通过研究发现脉冲星射电辐射束半径大小应该正比于周期的-1/3或-1/2次方.通过整理收集了87颗信噪比很好的、偏振位置角明显为"S"曲线的脉冲星数据,用脉冲星辐射束几何模型计算得到了每颗脉冲星的辐射束半径及误差.发现脉冲星周期小于0.85 s时,辐射束半径正比于周期的-1/2次方.周期大于0.85 s时,辐射束半径与周期之间并没有明显的幂律关系,但这可能与选择效应有关.当假设脉冲星的磁倾角为90?时,计算得到的辐射束半径随周期分布的下边界正比于周期的-1/2次方,与前人的结论一致.
[Abstract]:The period of pulsar is very stable. Previous studies have found that the radius of radio beam of pulsar should be proportional to the -1 / 3 or -1 / 2 of the period. 87 signal-to-noise ratio (SNR) have been collected. The radiative beam radius and error of each pulsar are calculated by using the geometric model of the pulsar radiation beam, and it is found that the pulsar period is less than 0.85 s. The radius of the radiation beam is proportional to the -1 / 2 power of the period. When the period is greater than 0.85 s, there is no obvious power law relationship between the radius of the radiation beam and the period. But this may be related to the selection effect when the magnetic inclination of the pulsar is assumed to be 90? The lower boundary of the radiation beam radius with periodic distribution is proportional to the -1 / 2 power of the period, which is consistent with the previous results.
【作者单位】：西南大学物理科学与技术学院;
【基金】：国家自然科学天文联合基金项目(U1231120)资助
【分类号】：P145.6
【正文快照】： 1引言脉冲星具有很强的磁场,是高速自转的磁中子星,其自转周期P很稳定.脉冲星的辐射一般用灯塔模型来解释.当脉冲星每自转1周,其辐射束若扫过观测者视线,就能观测到脉冲信号.单个脉冲信号的轮廓变化很大,但多个脉冲信号的累积轮廓非常稳定.一般呈现出单峰、双峰、三峰以及多峰

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