Wide Bandwidth Observations of Pulsars C, D, and J in 47 Tucanae

Lei Zhang, George Hobbs, Richard N. Manchester, Di Li, Pei Wang, Shi Dai, Jingbo Wang, Jane F. Kaczmarek, Andrew D. Cameron, Lawrence Toomey, Weiwei Zhu, Qijun Zhi, Chenchen Miao, Mao Yuan, Songbo Zhang, Zhenzhao Tao

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Abstract

We report the first wide-band observations of pulsars C, D, and J in the globular cluster 47 Tucanae (NGC 104) using the Ultra-Wideband Low (UWL) receiver system recently installed on the Parkes 64 m radio telescope. The wide frequency range of the UWL receiver (704-4032 MHz), along with the well-calibrated system, allowed us to obtain flux density measurements and polarization pulse profiles. The mean pulse profiles have significant linear and circular polarization, allowing for determination of the Faraday rotation measure for each pulsar. Precise measurements of the dispersion measures show a significant deviation in the value for pulsar D compared to earlier results. Searches for new pulsars in the cluster are ongoing and we have determined optimal bands for such searches using the Parkes UWL receiver system.

Original languageEnglish
Article numberL37
JournalAstrophysical Journal Letters
Volume885
Issue number2
DOIs
Publication statusPublished - 10 Nov 2019

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    Zhang, L., Hobbs, G., Manchester, R. N., Li, D., Wang, P., Dai, S., Wang, J., Kaczmarek, J. F., Cameron, A. D., Toomey, L., Zhu, W., Zhi, Q., Miao, C., Yuan, M., Zhang, S., & Tao, Z. (2019). Wide Bandwidth Observations of Pulsars C, D, and J in 47 Tucanae. Astrophysical Journal Letters, 885(2), [L37]. https://doi.org/10.3847/2041-8213/ab5218