Are FRBs emitted from rotating magnetospheres? Searching for periodicity in polarized bursts
Monthly Notices of the Royal Astronomical Society: Letters Oxford University Press (OUP) 542:1 (2025) L43-L47
Abstract:
The Thousand-Pulsar-Array programme on MeerKAT–XVI. Mapping the Galactic magnetic field with pulsar observations
Monthly Notices of the Royal Astronomical Society Oxford University Press 540:3 (2025) 2112-2130
Abstract:
Measuring the magnetic field of the Milky Way reveals the structure and evolution of the Galaxy. Pulsar rotation measures (RMs) provide a means to probe this Galactic magnetic field (GMF) in three dimensions. We use the largest single-origin data set of pulsar measurements, from the MeerKAT Thousand-Pulsar-Array, to map out GMF components parallel to pulsar lines of sight. We also present these measurements for easy integration into the consolidated RM catalogue, RMTable. Focusing on the Galactic disc, we investigate competing theories of how the GMF relates to the spiral arms, comparing our observational map with five analytic models of magnetic field structure. We also analyse RMs to extragalactic radio sources, to help build-up a three-dimensional picture of the magnetic structure of the Galaxy. In particular, our large number of measurements allows us to investigate differing magnetic field behaviour in the upper and lower halves of the Galactic plane. We find that the GMF is best explained as following the spiral arms in a roughly bisymmetric structure, with antisymmetric parity with respect to the Galactic plane. This picture is complicated by variations in parity on different spiral arms, and the parity change location appears to be shifted by a distance of 0.15 kpc perpendicular to the Galactic plane. This indicates a complex relationship between the large-scale distributions of matter and magnetic fields in our Galaxy. Future pulsar discoveries will help reveal the origins of this relationship with greater precision, as well as probing the locations of local magnetic field inhomogenities.The ubiquity of variable radio emission and spin-down rates in pulsars
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2025) staf427
The Thousand-Pulsar-Array programme on MeerKAT – XV. A comparison of the radio emission properties of slow and millisecond pulsars
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 532:3 (2024) 3558-3566
The Thousand-Pulsar-Array programme on MeerKAT XV: A comparison of the radio emission properties of slow and millisecond pulsars
(2024)