Parkes observations for project P1186 semester 2023APRS_04

The multi-frequency observation of the subpulse drifting of PSR J0934-5249 with Parkers. the PSR J0934-5249 was observed at a single frequency (325 MHz) using the GMRT. Its single pulse sequence shows clear coherent drifting with some short nulls. 2DFS plot also shows a clear feature confirming that this pulsar is a coherent drifter. The number of nulls were small for us to study any null induced drift rate changes in this pulsar. Arun Naidu et al. 2017 Estimated the drifting and nulling parameters for the first time in this pulsar. The observations using the Giant Meterwave Radio Telescope for PSR J0934-5249, but there was no further explanation of the pulsar (Basu et al. 2021). Both observations were made at low broadband. We propose using the ultra wideband reciver of Parkes to observe these pulsars for a long time, so that to give a detailed analysis of these pulsar on the wide bandwidth.

本研究针对脉冲星PSR J0934-5249的亚脉冲漂移现象，依托帕克斯（Parkes）望远镜开展多频观测研究。此前已有研究团队利用巨型米波射电望远镜（Giant Meterwave Radio Telescope, GMRT）在单频325 MHz下对该脉冲星进行观测，其单脉冲序列呈现出清晰的相干漂移特征，并伴随少量短消零现象。二维傅里叶谱（Two-Dimensional Fourier Spectrum，2DFS）图亦呈现明确特征，证实该脉冲星属于相干漂移型脉冲星。但该脉冲星的消零事件数量较少，使得我们难以开展由消零引发的漂移率变化相关研究。Arun Naidu等人于2017年首次针对该脉冲星估算了其漂移与消零参数。Basu等人2021年的研究虽利用巨型米波射电望远镜对PSR J0934-5249开展了观测，但未对该脉冲星的相关特性进行进一步阐释。上述两项观测均在低带宽频段下完成。本研究提出，可利用帕克斯望远镜的超宽带接收机对该脉冲星进行长期观测，以实现其宽频带特性的精细化分析。