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A MeerKAT look at the polarization of 47 Tucanae pulsars: magnetic field implications

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arxiv 2211.03815 v1 pith:GU5PPBC2 submitted 2022-11-07 astro-ph.HE

A MeerKAT look at the polarization of 47 Tucanae pulsars: magnetic field implications

F. Abbate , A. Possenti , A. Ridolfi , V. Venkatraman Krishnan , S. Buchner , E. D. Barr , M. Bailes , M. Kramer
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A. Cameron A. Parthasarathy W. van Straten W. Chen F. Camilo P. V. Padmanabh S. A. Mao P. C. C. Freire S. M. Ransom L. Vleeschower M. Geyer L. Zhang
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classification astro-ph.HE
keywords clusterpresencepulsarstucanaeturbulencebreakfunctionmagnetic
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We present the polarization profiles of 22 pulsars in the globular cluster 47 Tucanae using observations from the MeerKAT radio telescope at UHF-band (544-1088 MHz) and report precise values of dispersion measure (DM) and rotation measure (RM). We use these measurements to investigate the presence of turbulence in electron density and magnetic fields. The structure function of DM shows a break at $\sim 30$ arcsec ($\sim 0.6$ pc at the distance of 47 Tucanae) that suggests the presence of turbulence in the gas in the cluster driven by the motion of wind-shedding stars. On the other hand, the structure function of RM does not show evidence of a break. This non-detection could be explained either by the limited number of pulsars or by the effects of the intervening gas in the Galaxy along the line of sight. Future pulsar discoveries in the cluster could help confirm the presence and localise the turbulence.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Pulsars in Globular Clusters With the SKAO

    astro-ph.HE 2026-07 conditional novelty 3.0

    SKA-MID and SKA-LOW are predicted to discover 150–1700 new pulsars in Galactic globular clusters, more than doubling the current population of 345.

  2. Exploring the Magnetic Field Structure of the Milky Way with Pulsars in the SKA Era

    astro-ph.HE 2026-07 accept novelty 2.5

    SKA1 AA* and AA4 will roughly double-to-triple the known pulsar population and supply thousands of new RMs, enabling detailed 3D mapping of Galactic disk and halo magnetic fields.