Parkes observations for project P963 semester 2018APRS_02

Key questions about the radio emission from pulsar magnetospheres remain unanswered. These include the height of the radio emission above the surface, and the variations of height across the emitting field lines and as a function of frequency, and the overall filling factor of the pulsar beam. These questions are complicated by the unknown viewing geometry, which is mostly determined by the inclination angle between the rotation and magnetic axes (alpha) for the majority of pulsars. Here, we propose to investigate interpulse pulsars where we know that alpha is close to 90 degrees. We will use the ultra-wide band receiver to make sensitive observations across a continuous frequency range from 0.7 to 4.0~GHz. This will allow us, for the first time, to answer the questions posed above.

关于脉冲星磁层的射电辐射，仍有诸多核心科学问题悬而未决。这些问题包括：射电辐射距脉冲星表面的高度、不同辐射场线间的高度差异、辐射高度随频率的变化规律，以及脉冲星射电束的整体填充因子。观测几何未知为相关研究平添了复杂性——对于绝大多数脉冲星而言，其观测几何主要由自转轴与磁轴之间的倾角（α）决定。为此，我们提出针对α角接近90°的间脉冲脉冲星（interpulse pulsar）开展研究，这类脉冲星的α角已知接近90°。我们将使用超宽带接收机进行高灵敏度观测，覆盖0.7至4.0~GHz的连续频段。这将使我们首次得以解答上述所有核心科学问题。