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arXiv 2203.12427astro-ph.HE
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111兆赫四种旋转射电瞬态特性的研究

Investigation of four rotating radio transients properties at 111 MHz

S. A. Tyul'bashev, T. V. Smirnova, E. A. Brylyakova, M. A. Kitaeva

摘要:

分析了四个旋转无线电瞬变(RRAT),以前发现在监测调查运行了5.5年的频率为111 MHz的单个脉冲。在相当于每个RRAT连续观察5天的时间间隔内,在J 0640 +07、J1005+30、J1132+25和J1336+33中分别检测到90、389、206和157个脉冲。所研究的RRAT具有不同的脉冲幅度分布。对于J 0640 +07和J1132+25,在整个通量密度范围内的分布由单个指数描述。对于J1005+30和J1336+33,它是具有幂律尾部的对数正态函数。对于J 0640 +07和J1005+30,我们已经检测到具有几百个信噪比(S/N)的脉冲。对于J1132+25和J1336+33,最强脉冲的信噪比达到几十。这些RRAT显示出强烈的变化的特征的排放。当脉冲幅度的强度显著改变时,我们看到长时间的发射缺失或其强烈衰减。在这项工作中进行的分析表明,这是可能的,所有研究的RRAT,显然是巨大的脉冲的恒星。

英文摘要:

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.

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