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Faraday rotation measures of northern-hemisphere pulsars using CHIME/Pulsar

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arxiv 2006.06538 v1 pith:YJVYYWZ6 submitted 2020-06-08 astro-ph.IM astro-ph.HEastro-ph.SR

C. Ng , A. Pandhi , A. Naidu , E. Fonseca , V. M. Kaspi , K. W. Masui , R. Mckinven , A. Renard
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P. Scholz I. H. Stairs S. P. Tendulkar K. Vanderlinde
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classification astro-ph.IMastro-ph.HEastro-ph.SR
keywords chimefaradaypulsarpulsarscontributedatagalactichemisphere
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Using commissioning data from the first year of operation of the Canadian Hydrogen Intensity Mapping Experiment's (CHIME) Pulsar backend system, we conduct a systematic analysis of the Faraday Rotation Measure (RM) of the northern hemisphere pulsars detected by CHIME. We present 55 new RMs as well as obtain improved RM uncertainties for 25 further pulsars. CHIME's low observing frequency and wide bandwidth between 400-800 MHz contribute to the precision of our measurements, whereas the high cadence observation provide extremely high signal-to-noise co-added data. Our results represent a significant increase of the pulsar RM census, particularly regarding the northern hemisphere. These new RMs are for sources that are located in the Galactic plane out to 10 kpc, as well as off the plane to a scale height of ~16 kpc. This improved knowledge of the Faraday sky will contribute to future Galactic large-scale magnetic structure and ionosphere modelling.

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Cited by 1 Pith paper

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

    astro-ph.HE 2026-07 accept novelty 2.5 of 10

    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.

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