Wide Bandwidth Observations of Pulsars C, D and J in 47 Tucanae
| Autor: | George Hobbs, Qi-Jun Zhi, Songbo Zhang, Zhenzhao Tao, Lei Zhang, L. Toomey, Andrew Cameron, Jane F. Kaczmarek, Shi Dai, Richard N. Manchester, Jingbo Wang, Pei Wang, Di Li, Weiwei Zhu, Chenchen Miao, Mao Yuan |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
High Energy Astrophysical Phenomena (astro-ph.HE) 010504 meteorology & atmospheric sciences Astrophysics::High Energy Astrophysical Phenomena Bandwidth (signal processing) Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Radio telescope symbols.namesake Pulsar Space and Planetary Science Globular cluster 0103 physical sciences Faraday effect symbols Wideband Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics Circular polarization 0105 earth and related environmental sciences Receiver system |
| DOI: | 10.48550/arxiv.1910.11990 |
| Popis: | We report the first wideband observations of pulsars C, D and J in the globular cluster 47Tucanae (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 on-going and we have determined optimal bands for such searches using the Parkes UWL receiver system. |
| Databáze: | OpenAIRE |
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