Realistic modeling of the pulse profile of PSR J0737-3039A

Perera, B. B. P., Kim, C., McLaughlin, M. A., Ferdman, R. D. ORCID:, Kramer, M., Stairs, I. H., Freire, P. C. C. and Possenti, A. (2014) Realistic modeling of the pulse profile of PSR J0737-3039A. Astrophysical Journal, 787 (1). ISSN 0004-637X

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The Double Pulsar, PSR J0737-3039A/B, is a unique system in which both neutron stars have been detected as radio pulsars. As shown in Ferdman et al., there is no evidence for pulse profile evolution of the A pulsar, and the geometry of the pulsar was fit well with a double-pole circular radio beam model. Assuming a more realistic polar cap model with a vacuum retarded dipole magnetosphere configuration including special relativistic effects, we create synthesized pulse profiles for A given the best-fit geometry from the simple circular beam model. By fitting synthesized pulse profiles to those observed from pulsar A, we constrain the geometry of the radio beam, namely the half-opening angle and the emission altitude, to be similar to 30 degrees and similar to 10 neutron star radii, respectively. Combining the observational constraints of PSR J0737-3039A/B, we are able to construct the full three-dimensional orbital geometry of the Double Pulsar. The relative angle between the spin axes of the two pulsars (Delta(S)) is estimated to be similar to(138 degrees +/- 5 degrees) at the current epoch and will likely remain constant until tidal interactions become important in similar to 85 Myr, at merger.

Item Type: Article
Uncontrolled Keywords: general binaries,general pulsars,neutron stars
Depositing User: LivePure Connector
Date Deposited: 10 Jul 2018 15:30
Last Modified: 13 Jul 2023 10:30
DOI: 10.1088/0004-637X/787/1/51

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