Determination of the orbital parameters of binary pulsars

Details Determination of the orbital parameters of binary pulsars Determination of the orbital parameters of binary pulsars

2008-03-13

arxiv.org/abs/0803.1907v2

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures, 2 tables, Accepted by MNRAS, minor clarifications in references added

Scientific paper

10.1111/j.1365-2966.2008.13213.x

We present a simple method for determination of the orbital parameters of binary pulsars, using data on the pulsar period at multiple observing epochs. This method uses the circular nature of the velocity space orbit of Keplerian motion and produces preliminary values based on two one dimensional searches. Preliminary orbital parameter values are then refined using a computationally efficient linear least square fit. This method works for random and sparse sampling of the binary orbit. We demonstrate the technique on (a) the highly eccentric binary pulsar PSR J0514-4002 (the first known pulsar in the globular cluster NGC 1851) and (b) 47 Tuc T, a binary pulsar with a nearly circular orbit.

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