21 year timing of the black-widow pulsar J2051-0827

Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Date Issued
2016
Author(s)
Shaifullah, G.
•
Verbiest, J. P. W.
•
Freire, P. C. C.
•
Tauris, T. M.
•
Wex, N.
•
Osłowski, S.
•
Stappers, B. W.
•
Bassa, C. G.
•
Caballero, R. N.
•
Champion, D. J.
•
Cognard, I.
•
Desvignes, G.
•
Graikou, E.
•
Guillemot, L.
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Janssen, G. H.
•
Jessner, A.
•
Jordan, C.
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Karuppusamy, R.
•
Kramer, M.
•
Lazaridis, K.
•
Lazarus, P.
•
Lyne, A. G.
•
McKee, J. W.
•
•
•
Tiburzi, C.
DOI
10.1093/mnras/stw1737
Abstract
Timing results for the black-widow pulsar J2051-0827 are presented, using a 21 year data set from four European Pulsar Timing Array telescopes and the Parkes radio telescope. This data set, which is the longest published to date for a black-widow system, allows for an improved analysis that addresses previously unknown biases. While secular variations, as identified in previous analyses, are recovered, short-term variations are detected for the first time. Concurrently, a significant decrease of ∼ 2.5 × 10- 3 cm- 3 pc in the dispersion measure associated with PSR J2051-0827 is measured for the first time and improvements are also made to estimates of the proper motion. Finally, PSR J2051-0827 is shown to have entered a relatively stable state suggesting the possibility of its eventual inclusion in pulsar timing arrays.
Volume
462
Issue
1
Start page
1029
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