University Of Tasmania

File(s) not publicly available

The Mean Pulse Profile of PSR J0737-3039A

journal contribution
posted 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 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.


Publication title

The Astrophysical Journal




1 II






School of Natural Sciences


University of Chicago Press

Place of publication

Chicago, USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania