Parkes observations for project P1148 semester 2022APRS_02

We propose observations with the ultra-wide-bandwidth, low frequency receiver (UWL) installed at the Parkes telescope to study a sample of pulsars known to exhibit mode changing phenomenon. The wide frequency range of the UWL receiver, along with the well-calibrated system, allowed us to obtain flux density measurements and polarization pulse profiles. The mode switch pattern in a wide frequency range will be obtained and can confirm whether this effect is dependent on observation frequency. The properties of polarization profiles of different modes in wide frequency will be studied. We will also obtain the spectrum of different modes, and compare spectral indexes of different modes for these mode changing pulsars. Our observations will allow us to constrain the physics origins of the mode changing phenomenon.

本研究提出利用安装于帕克斯望远镜（Parkes telescope）的超宽带宽低频接收机（UWL）开展观测，以研究已知存在模式变换现象的脉冲星样本。该UWL接收机具备宽泛的频率覆盖范围，加之经过精准校准的观测系统，可使我们获取流量密度测量数据与偏振脉冲轮廓。我们将获得宽频率范围内的模式切换特征，以此验证该效应是否与观测频率相关；同时将研究不同模式下偏振轮廓在宽频率区间内的特性。此外，本研究还将获取不同模式的射电频谱，并对比这类模式变换脉冲星各模式的谱指数。本次观测将有助于我们约束模式变换现象的物理起源。