Journal article
The impact of glitches on young pulsar rotational evolution
ME Lower, S Johnston, L Dunn, RM Shannon, M Bailes, S Dai, M Kerr, RN Manchester, A Melatos, LS Oswald, A Parthasarathy, C Sobey, P Weltevrede
Monthly Notices of the Royal Astronomical Society | Published : 2021
Abstract
We report on a timing programme of 74 young pulsars that have been observed by the Parkes 64-m radio telescope over the past decade. Using modern Bayesian timing techniques, we have measured the properties of 124 glitches in 52 of these pulsars, of which 74 are new. We demonstrate that the glitch sample is complete to fractional increases in spin frequency greater than Delta \nu 90{{\ \rm per\ cent}} \mathrm{ g}}/\nu \approx 8.1 \times 10 -9}$. We measure values of the braking index, n, in 33 pulsars. In most of these pulsars, their rotational evolution is dominated by episodes of spin-down with n > 10, punctuated by step changes in the spin-down rate at the time of a large glitch. The s..
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Grants
Awarded by Australian Research Council
Funding Acknowledgements
The Parkes radio telescope (Murriyang) is part of the Australia Telescope National Facility that is funded by the Australian Government for operation as a National Facility managed by CSIRO. We acknowledge the Wiradjuri people as the traditional owners of the Observatory site. This work made use of the OzSTAR national HPC facility, which is funded by Swinburne University of Technology and the National Collaborative Research Infrastructure Strategy (NCRIS). This work was supported by the Australian Research Council (ARC) Laureate Fellowship FL150100148, ARC Discovery Project DP170103625, and the ARC Centre of Excellence CE170100004 (OzGrav). MEL receives support from the Australian Government Research Training Program and CSIRO. RMS is supported through ARC Future Fellowship FT190100155. SD is the recipient of an ARC Discovery Early Career Award (DE210101738) funded by the Australian Government. LSO acknowledges funding from the UK Science and Technology Facilities Council (STFC) Grant Code ST/R505006/1. Work at NRL is supported by NASA. We thank J. B. Carlin for insightful comments and the anonymous referee for thorough review. We acknowledge use of the Astronomer's Telegram and the NASA Astrophysics Data Service. We made use of the following software packages: ASTROPY (Astropy Collaboration et al. 2018), BILBY (Ashton et al. 2019), CHAINCONSUMER (Hinton 2016), LIBSTEMPO (Vallisneri 2020), MATPLOTLIB (Hunter 2007), NUMPY (Harris et al. 2020), PANDAS (McKinney 2010), PSRCHIVE (Hotan et al. 2004; van Straten& Bailes 2011), PSRQPY (Pitkin 2018), PYMULTINEST (Feroz, Hobson& Bridges 2009; Buchner 2016), SCIPY (Jones, Oliphant & Peterson 2001), TEMPO2 (Edwards et al. 2006; Hobbs et al. 2006), and TEMPONEST (Lentati et al. 2014).