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; Jan F. Kaczmarek; Andrew D. Cameron; Lawrence Toomey; Weiwei Zhu; Qijun Zhi; Chenchen Miao; Mao Yuan; Songbo Zhang; Zhenzhao Tao

doi:10.3847/2041-8213/ab5218

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, Jan F. Kaczmarek, Andrew D. Cameron, Lawrence Toomey, Weiwei Zhu, Qijun Zhi, Chenchen Miao, Mao Yuan, Songbo Zhang, Zhenzhao Tao

Western Sydney University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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 language	English
Article number	L37
Number of pages	6
Journal	Astrophysical Journal Letters
Volume	885
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/ab5218
Publication status	Published - 2019

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@article{0992f3e9a791420181eff1183ec33d58,

title = "Wide bandwidth observations of pulsars C, D, and J in 47 Tucanae",

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.",

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

year = "2019",

doi = "10.3847/2041-8213/ab5218",

language = "English",

volume = "885",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "Institute of Physics Publishing",

number = "2",

}

TY - JOUR

T1 - Wide bandwidth observations of pulsars C, D, and J in 47 Tucanae

AU - Zhang, Lei

AU - Hobbs, George

AU - Manchester, Richard N.

AU - Li, Di

AU - Wang, Pei

AU - Dai, Shi

AU - Wang, Jingbo

AU - Kaczmarek, Jan F.

AU - Cameron, Andrew D.

AU - Toomey, Lawrence

AU - Zhu, Weiwei

AU - Zhi, Qijun

AU - Miao, Chenchen

AU - Yuan, Mao

AU - Zhang, Songbo

AU - Tao, Zhenzhao

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

UR - https://hdl.handle.net/1959.7/uws:65085

U2 - 10.3847/2041-8213/ab5218

DO - 10.3847/2041-8213/ab5218

M3 - Article

SN - 2041-8205

VL - 885

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L37

ER -

Wide bandwidth observations of pulsars C, D, and J in 47 Tucanae

Abstract

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