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The Mean Pulse Profile of PSR J0737-3039A


Manchester, RN and Kramer, M and Possenti, A and Lyne, AG and Burgay, M and Stairs, IH and Hotan, AW and McLaughlin, MA and Lorimer, DR and Hobbs, GB and Sarkissian, JM and D'Amico, N and Camilo, F and Joshi, BC and Freire, PCC, The Mean Pulse Profile of PSR J0737-3039A, The Astrophysical Journal, 621, (1 II) pp. L49-L52. ISSN 0004-637X (2005) [Refereed Article]

DOI: doi:10.1086/429128


General relativity predicts that the spin axes of the pulsars in the double-pulsar system PSR J0737-3039A/B will precess rapidly, in general leading to a change in the observed pulse profiles. We have observed this system over a 1 yr interval using the Parkes 64 m radio telescope at three frequencies: 680, 1390, and 3030 MHz. These data, combined with the short survey observation made 2 years earlier, show no evidence for significant changes in the pulse profile of PSR J0737-3039A, the 22 ms pulsar. The limit on variations of the profile 10% width is about 0°50 yr-1. These results imply an angle δ between the pulsar spin axis and the orbit normal of ≤60°, consistent with recent evolutionary studies of the system. Although a wide range of system parameters remain consistent with the data, the model recently proposed by F. A. Jenet & S. M. Ransom can be ruled out. A nonzero ellipticity for the radiation beam gives slightly but not significantly improved fits to the data, so that a circular beam describes the data equally well within the uncertainties. © 2005. The American Astronomical Society. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Hotan, AW (Dr Aidan Hotan)
ID Code:45125
Year Published:2005
Web of Science® Times Cited:50
Deposited By:Physics
Deposited On:2007-07-03
Last Modified:2007-07-03

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