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Detection of 107 glitches in 36 southern pulsars

Yu, M. and Manchester, R. N. and Hobbs, G. and Johnston, S. and Kaspi, V. M. and Keith, M. and Lyne, A. G. and Qiao, G. J. and Ravi, V. and Sarkissian, J. M. and Shannon, R. and Xu, R. X. (2013) Detection of 107 glitches in 36 southern pulsars. Monthly Notices of the Royal Astronomical Society, 429 (1). pp. 688-724. ISSN 1365-2966. doi:10.1093/mnras/sts366.

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Timing observations from the Parkes 64-m radio telescope for 165 pulsars between 1990 and 2011 have been searched for period glitches. Data spans for each pulsar ranged between 5.3 and 20.8 yr. From the total of 1911 yr of pulsar rotational history, 107 glitches were identified in 36 pulsars. Out of these glitches, 61 have previously been reported whereas 46 are new discoveries. Glitch parameters, both for the previously known and the new glitch detections, were measured by fitting the timing residual data. Observed relative glitch sizes Δν_g/ν range between 10^(−10) and 10^(−5), where ν = 1/P is the pulse frequency. We confirm that the distribution of Δν_g/ν is bimodal with peaks at approximately 10^(−9) and 10^(−6). Glitches are mostly observed in pulsars with characteristic ages between 10^3 and 10^5 yr, with large glitches mostly occurring in the younger pulsars. Exponential post-glitch recoveries were observed for 27 large glitches in 18 pulsars. The fraction Q of the glitch that recovers exponentially also has a bimodal distribution. Large glitches generally have low Q, typically just a few per cent, but large Q values are observed in both large and small glitches. Observed time constants for exponential recoveries ranged between 10 and 300 d with some tendency for longer time-scales in older pulsars. Shorter time-scale recoveries may exist but were not revealed by our data which typically have observation intervals of 2–4 weeks. For most of the 36 pulsars with observed glitches, there is a persistent linear increase in ν˙ (i.e. decrease in the slow-down rate |v̇|⁠) in the interglitch interval. Where an exponential recovery is also observed, the effects of this are superimposed on the linear increase in v̇⁠. In some but not all cases, the slope of the linear recovery changes at the time of a glitch. The vv̈ values characterizing the linear changes in ν˙ are almost always positive and, after subtracting the magnetospheric component of the braking, are approximately proportional to the ratio of |v̇| and the interglitch interval, as predicted by vortex-creep models.

Item Type:Article
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URLURL TypeDescription Paper
Kaspi, V. M.0000-0001-9345-0307
Ravi, V.0000-0002-7252-5485
Additional Information:© 2012 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2012 November 6. Received 2012 November 4; in original form 2012 May 19. The Parkes radio telescope is part of the Australia Telescope, which is funded by the Commonwealth of Australia for operation as a National Facility managed by the Commonwealth Scientific and Industrial Research Organisation (CSIRO). MY is funded by the National Basic Research Program of China (2012CB821800) and China Scholarship Council (No. 2009601129). GH is the recipient of an Australian Research Council QEII Fellowship (#DP0878388). VMK is funded by NSERC, CIFAR, FQRNT, CRC and is the recipient of the Killam Fellowship and the Lorne Trottier Chair. VR is a recipient of a John Stocker Post-graduate Scholarship from the Science and Industry Endowment Fund. RXX and GJQ acknowledge the NSFC (10935001, 10973002 and 10833003) and the National Basic Research Program of China (2012CB821800 and 2009CB824800).
Funding AgencyGrant Number
Commonwealth of AustraliaUNSPECIFIED
National Basic Research Program of China2012CB821800
China Scholarship Council2009601129
Australian Research CouncilDP0878388
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canadian Institute for Advanced Research (CIFAR)UNSPECIFIED
Fonds de recherche du Québec – Nature et technologies (FRQNT)UNSPECIFIED
Canada Research ChairUNSPECIFIED
Fulbright CanadaUNSPECIFIED
Lorne Trottier Chair in Astrophysics and CosmologyUNSPECIFIED
Science and Industry Endowment FundUNSPECIFIED
National Natural Science Foundation of China10935001
National Natural Science Foundation of China10973002
National Natural Science Foundation of China10833003
National Basic Research Program of China2012CB821800
National Basic Research Program of China2009CB824800
Subject Keywords:stars: neutron, pulsars: general
Issue or Number:1
Record Number:CaltechAUTHORS:20190626-101118147
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Official Citation:M. Yu, R. N. Manchester, G. Hobbs, S. Johnston, V. M. Kaspi, M. Keith, A. G. Lyne, G. J. Qiao, V. Ravi, J. M. Sarkissian, R. Shannon, R. X. Xu, Detection of 107 glitches in 36 southern pulsars, Monthly Notices of the Royal Astronomical Society, Volume 429, Issue 1, 11 February 2013, Pages 688–724,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96723
Deposited By: George Porter
Deposited On:26 Jun 2019 19:51
Last Modified:16 Nov 2021 17:23

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