The Thousand-Pulsar-Array programme on MeerKAT IV: Polarisation properties of young, energetic pulsars

M. Serylak, S. Johnston, M. Kramer, S. Buchner, A. Karastergiou, M. J. Keith, A. Parthasarathy, P. Weltevrede, M. Bailes, E. D. Barr, F. Camilo, M. Geyer, B. V. Hugo, A. Jameson, D. J. Reardon, R. M. Shannon, R. Spiewak, W. van Straten, V. Venkatraman Krishnan

Published 2020-09-12Version 1

We present observations of 35 high spin-down energy radio pulsars using the MeerKAT telescope. Polarisation profiles and associated parameters are also presented. We derive the geometry for a selection of pulsars which show interpulse emission. We point out that, in several cases, these radio pulsars should also be seen in $\gamma$-rays but that improved radio timing is required to aid the high-energy detection. We discuss the relationship between the width of the radio profile and its high-energy detectability. Finally, we reflect on the correlation between the spin-down energy and the radio polarisation fraction and the implications this may have for $\gamma$-ray emission.