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arXiv:0711.4927 (astro-ph)
[Submitted on 30 Nov 2007 (v1), last revised 7 Dec 2007 (this version, v2)]

Title:The double pulsar: evolutionary constraints from the system geometry

Authors:R. D. Ferdman, I. H. Stairs, M. Kramer, R. N. Manchester, A. G. Lyne, R. P. Breton, M. A. McLaughlin, A. Possenti, M. Burgay
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Abstract: The double pulsar system PSR J0737-3039A/B is a highly relativistic double neutron star (DNS) binary, with a 2.4-hour orbital period. The low mass of the second-formed NS, as well the low system eccentricity and proper motion, point to a different evolutionary scenario compared to other known DNS systems. We describe analysis of the pulse profile shape over 6 years of observations, and present the resulting constraints on the system geometry. We find the recycled pulsar in this system, PSR J0737-3039A, to have a low misalignment between its spin and orbital angular momentum axes, with a 68.3% upper limit of 6.1 degrees, assuming emission from both magnetic poles. This tight constraint lends credence to the idea that the supernova that formed the second pulsar was relatively symmetric, possibly involving electron-capture onto an O-Ne-Mg core.
Comments: 5 page, 2 figures; To appear in the conference proceedings "40 Years of Pulsars: Millisecond Pulsars, Magnetars, and More", August 12-17, 2007, at McGill University, Montreal, Canada. Version with full-resolution figures can be found at this http URL typos corrected, some rewording, and references added
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0711.4927 [astro-ph]
  (or arXiv:0711.4927v2 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0711.4927
Journal reference: AIP Conf.Proc.983:474-478,2008
Related DOI: https://doi.org/10.1063/1.2900277

Submission history

From: Robert D. Ferdman [view email]
[v1] Fri, 30 Nov 2007 20:58:04 UTC (72 KB)
[v2] Fri, 7 Dec 2007 05:34:25 UTC (72 KB)
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