Parkes observations for project P1079 semester 2020OCTS_02

Pulsars in compact binary systems are unique laboratories to probe gravitational theories, measure pulsar masses and study the formation and evolution of binary systems. However, such binary systems are difficult to find because of their orbital modulation. New surveys at both radio and optical wavelengths open up new opportunities to search for pulsars in compact binaries with novel methods. In this proposal, we combined radio continuum surveys with the Gaia DR2 catalogue, and identified a sample of pulsar candidates based on their optical-radio association, large transverse velocities and steep spectra. We propose to search for their periodic singles with Parkes UWL receiver. Thanks to the superior performance of UWL below 1GHz, we will be able to detect their periodic signals with relatively short integration and avoid the effect of potential strong orbital modulation.

致密双星系统中的脉冲星是探究引力理论、精确测定脉冲星质量以及研究双星系统形成与演化的独特天然实验室。然而，这类双星系统受轨道调制效应影响，难以被探测发现。射电与光学波段的新型巡天项目，为采用创新方法搜寻致密双星系统中的脉冲星带来了全新契机。在本项目研究提案中，我们将射电连续谱巡天数据与盖亚DR2（Gaia DR2）星表进行结合，基于光学-射电关联特征、大横向自行速度以及陡谱特性，筛选得到一批脉冲星候选体。我们计划使用帕克斯UWL接收机（Parkes UWL receiver）搜寻这些候选体的周期性脉冲信号。得益于UWL接收机在1GHz以下频段的优异性能，我们能够通过相对较短的积分时间探测到其周期性信号，同时规避潜在的强轨道调制效应。