论文标题
由五百米孔球形射电望远镜发现的长周期脉冲星的排放变化（快速）
Emission Variation of a Long-period Pulsar Discovered by the Five-hundred-meter Aperture Spherical Radio Telescope (FAST)
论文作者
论文摘要
我们报告使用五百米的光圈球形射电望远镜观察到以1.25 GHz的频率观察到的PSR J1900+4221（Crafts 19c10）的单脉冲发射的变化。集成的脉冲曲线显示了两个不同的组件，在此称为领先和尾随组件，后一个组件还包含第三个弱分量。单脉冲序列揭示了不同的排放，证明是无效的，规则和明亮的脉冲，每个脉冲具有特殊的丰度和持续时间分布。还有脉冲遵循对数正态分布的脉冲表明另一种发射的可能性，其中脉冲星辐射较弱。在不同的排放中可以看到轮廓形状的变化。我们共同和分别检查了前导和尾随组件的发射变化，并找到两个组件之间的中等相关性。根据脉搏宽度，倾斜角估计约为7°，我们讨论该脉冲星中的无效似乎与年龄和旋转期间没有显示相关性。
We report on the variation in the single-pulse emission from PSR J1900+4221 (CRAFTS 19C10) observed at frequency centered at 1.25 GHz using the Five-hundred-meter Aperture Spherical radio Telescope. The integrated pulse profile shows two distinct components, referred to here as the leading and trailing components, with the latter component also containing a third weak component. The single-pulse sequence reveals different emissions demonstrating as nulling, regular, and bright pulses, each with a particular abundance and duration distribution. There also exists pulses that follow a log-normal distribution suggesting the possibility of another emission, in which the pulsar is radiating weakly. Changes in the profile shape are seen across different emissions. We examine the emission variations in the leading and trailing components collectively and separately, and find moderate correlation between the two components. The inclination angle is estimated to be about 7° based on pulse-width, and we discuss that nulling in this pulsar does not seem to show correlation with age and rotation period.
