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12th of May 2023
A broad-band population view of pulsar polarisation
by Oswald et al.
Oswald et al. have undertaken a study of the broadband polarization of 271 young radio pulsars, focusing particularly on circular polarization, using high quality observations made with the Ultra-Wideband Low receiver on Murriyang, the Parkes 64m radio telescope. As an understanding of pulsar radio polarization requires both a detailed study of individual sources and a collective understanding of population-level trends, Oswald et al. provide visualizations of phase- and frequency-resolved polarization parameters of individual sources, and highlight the importance of including the impact of circular polarization and spin-down energy in overall trends. The figure above shows pulse profiles at eight frequencies from 812–3780 MHz, with total intensity (black), linear polarization (red dashes), and circular polarization (blue dots). Frequency evolution of both the polarization fraction and profile shape of its linear polarization is evident, with the linear polarization fraction decreasing significantly at high frequencies.

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