Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16

Details Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16 Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16

2010-11-02

arxiv.org/abs/1011.0718v1

Astrophys.J.722:1030-1034,2010

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Published in APJ, 722, 1030 (2010)

Scientific paper

10.1088/0004-637X/722/2/1030

We present results of more than three decades of timing measurements of the first known binary pulsar, PSR B1913+16. Like most other pulsars, its rotational behavior over such long time scales is significantly affected by small-scale irregularities not explicitly accounted for in a deterministic model. Nevertheless, the physically important astrometric, spin, and orbital parameters are well determined and well decoupled from the timing noise. We have determined a significant result for proper motion, $\mu_{\alpha} = -1.43\pm0.13$, $\mu_{\delta}=-0.70\pm0.13$ mas yr$^{-1}$. The pulsar exhibited a small timing glitch in May 2003, with ${\Delta f}/f=3.7\times10^{-11}$, and a smaller timing peculiarity in mid-1992. A relativistic solution for orbital parameters yields improved mass estimates for the pulsar and its companion, $m_1=1.4398\pm0.0002 \ M_{\sun}$ and $m_2=1.3886\pm0.0002 \ M_{\sun}$. The system's orbital period has been decreasing at a rate $0.997\pm0.002$ times that predicted as a result of gravitational radiation damping in general relativity. As we have shown before, this result provides conclusive evidence for the existence of gravitational radiation as predicted by Einstein's theory.

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