论文标题
独立发现带有不寻常的子脉冲漂移特性的无效的脉冲星，并带有默奇森广场阵列
Independent discovery of a nulling pulsar with unusual sub-pulse drifting properties with the Murchison Widefield Array
论文作者
论文摘要
我们报告了正在进行的南部Sky Mwa Rapid 2米（智能）Pulsar调查中的Murchison Widefield阵列（MWA）的独立发现与Murchison Widefield阵列（MWA）。 J0027-1956的周期为〜1.306 s，分散度度量（DM）为〜20.869 PC CM^-3，而无效的分数约为77％。这种脉冲星强调了调查长期居住时间（〜80分钟）的优势，当完全搜索时，它将对预期的类似明亮，间歇性脉冲星的预期种群敏感。 MWA的140-170 MHz频段中的单个脉冲分析还揭示了一个复杂的子脉冲漂移行为，包括模式切换脉冲星的漂移速率特征的快速变化，以及模式内漂移速率的缓慢，一致的演变。在某些较长的漂移序列中，原本平滑的漂移速率演变的中断优先在特定相位发生，通常持续一些脉冲。这些特性使该脉冲星成为理想的测试床，用于盛行的漂流行为模型，例如轮播模型。
We report the independent discovery of PSR J0027-1956 with the Murchison Widefield Array (MWA) in the ongoing Southern-sky MWA Rapid Two-meter (SMART) pulsar survey. J0027-1956 has a period of ~1.306 s, a dispersion measure (DM) of ~20.869 pc cm^-3 , and a nulling fraction of ~77%. This pulsar highlights the advantages of the survey's long dwell times (~80 min), which, when fully searched, will be sensitive to the expected population of similarly bright, intermittent pulsars with long nulls. A single-pulse analysis in the MWA's 140-170 MHz band also reveals a complex sub-pulse drifting behavior, including both rapid changes of the drift rate characteristic of mode switching pulsars, as well as a slow, consistent evolution of the drift rate within modes. In some longer drift sequences, interruptions in the otherwise smooth drift rate evolution occur preferentially at a particular phase, typically lasting a few pulses. These properties make this pulsar an ideal test bed for prevailing models of drifting behavior such as the carousel model.
