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The Mean Pulse Profile of PSR J0737-3039A
journal contributionposted on 2023-05-16, 19:24 authored by Manchester, RN, Kramer, M, Possenti, A, Lyne, AG, Burgay, M, Stairs, IH, Hotan, AW, McLaughlin, MA, Lorimer, DR, Hobbs, GB, Sarkissian, JM, D'Amico, N, Camilo, F, Joshi, BC, Freire, PCC
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 0Â°50 yr-1. These results imply an angle Î´ between the pulsar spin axis and the orbit normal of â‰¤60Â°, 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. Â© 2005. The American Astronomical Society. All rights reserved.
Publication titleThe Astrophysical Journal
Department/SchoolSchool of Natural Sciences
PublisherUniversity of Chicago Press
Place of publicationChicago, USA