论文标题
研究在111 MHz处的四个旋转无线电瞬变特性
Investigation of four rotating radio transients properties at 111 MHz
论文作者
论文摘要
介绍了以前在以111 MHz频率运行的监测调查中发现的四个旋转无线电瞬变（RRAT）的单个脉冲的分析。在每次RRAT，90、389、206和157个脉冲的连续观察中，在一个时间间隔内分别在J0640+07，J1005+30，J1132+25和J1336+33中检测到157个脉冲。研究的RRAT具有不同的脉冲振幅分布。对于J0640+07和J1132+25，在整个通量密度范围内，单个指数描述了分布。对于J1005+30和J1336+33，它是具有功率法尾的对数正态函数。对于J0640+07和J1005+30，我们检测到脉冲的脉冲（S/N）比为几百个。对于J1132+25和J1336+33，最强的脉冲的S/N达到了几十个。这些rrats显示出发射特征的强烈改变。当脉冲振幅的强度发生显着变化时，我们会看到长时间缺乏发射或强大的衰减间隔。在这项工作中进行的分析表明，所有研究的rrats显然都是具有巨型脉冲的脉冲星。
The analysis of individual pulses of four rotating radio transients (RRATs), previously discovered in a monitoring survey running for 5.5 years at the frequency of 111 MHz, is presented. At a time interval equivalent to five days of continuous observations for each RRAT, 90, 389, 206, and 157 pulses were detected in J0640+07, J1005+30, J1132+25, and J1336+33, respectively. The investigated RRATs have a different distribution of the pulses amplitude. For J0640+07 and J1132+25, the distribution is described by a single exponent over the entire range of flux densities. For J1005+30 and J1336+33, it is a lognormal function with a power law tail. For J0640+07 and J1005+30, we have detected pulses with a signal-to-noise (S/N) ratio of few hundreds. For J1132+25 and J1336+33, the S/N of the strongest pulses reaches several tens. These RRATs show strong changing of character of emission. When strengths of pulse amplitudes significantly changed, we see long intervals of absence of emission or its strong attenuation. The analysis carried out in this work shows that it is possible that all the studied RRATs are, apparently, pulsars with giant pulses.
