Parkes observations for project P1349 semester 2025OCTS_02

We propose a study of pulsars with interpulse (IP) emissions using the Ultra-Wideband Low (UWL) receiver on the Parkes radio telescope (Murriyang). This project aims to investigate the polarization and emission properties of these pulsars through detailed modeling using the rotating vector model (RVM). Polarization profiles will be obtained over a wide frequency range, from 704 MHz to 4032 MHz. We will measure the emission height differences between the main pulse (MP) and IP as a function of frequency, allowing us to explore their frequency dependence and to test the radius-to-frequency mapping (RFM) model. Spectral analyses of individual profile components will be performed to constrain the emission properties and investigate differences between the MP and IP. Additionally, we will examine quasi-periodic microstructure in both MP and IP, aiming to characterize the microstructure period and explore its potential correlation with the magnetic inclination angle. This comprehensive investigation will yield new insights into the emission geometry of pulsars with IP emissions, contributing to a better understanding of their unique characteristics within the pulsar population.

本研究针对伴脉冲（interpulse, IP）辐射脉冲星，依托帕克斯射电望远镜（Murriyang）的超宽带低（Ultra-Wideband Low, UWL）接收机开展观测研究。本项目旨在通过旋转矢量模型（rotating vector model, RVM）开展精细化建模，探究此类脉冲星的偏振特性与辐射属性。研究将在704 MHz至4032 MHz的宽频范围内获取偏振轮廓数据。我们将测量主脉冲（main pulse, MP）与伴脉冲的辐射高度差随频率的变化关系，以此探究二者的频率依赖性，并对半径-频率映射（radius-to-frequency mapping, RFM）模型进行验证。研究将对各轮廓成分开展频谱分析，以约束辐射属性并探究主脉冲与伴脉冲之间的差异。此外，我们还将分析主脉冲与伴脉冲中的准周期性微结构，旨在明确微结构的周期特征，并探究其与磁倾角之间的潜在关联。此项综合性研究将为伴脉冲辐射脉冲星的辐射几何结构提供全新认知，助力学界更好地理解此类脉冲星在脉冲星群体中的独特属性。