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The Mean Pulse Profile of PSR J0737-3039A | | R N Manchester
; M Kramer
; A Possenti
; A G Lyne
; M Burgay
; I H Stairs
; A W Hotan
; M A McLaughlin
; D R Lorimer
; G B Hobbs
; J M Sarkissian
; N D’Amico
; F Camilo
; B C Joshi & P C C Freire
; | | Date: |
31 Dec 2004 | | Journal: | Astrophys.J. 621 (2005) L49-L52 | | Subject: | astro-ph | | Abstract: | 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 one-year 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 two 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 0.5 deg per year. These results imply an angle delta between the pulsar spin axis and the orbit normal of <~ 60 deg, consistent with recent evolutionary studies of the system. Although a wide range of system parameters remain consistent with the data, the model proposed by Jenet & Ransom (2004) can be ruled out. A non-zero 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. | | Source: | arXiv, astro-ph/0501665 | | Services: | Forum | Review | PDF | Favorites | |
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