Detection of gravitational waves by pulsar timing

Details Detection of gravitational waves by pulsar timing Detection of gravitational waves by pulsar timing

2010-12-14

arxiv.org/abs/1012.3038v1

Proceedings of the pulsar conference-2010, Sardinia, 10-15 Oct. 2010

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

4 pages, 3 figures

Scientific paper

A new approach to the problem of gravitational waves detection based on simultaneous timing of several pulsars and subsequent expansion of the post-fit timing data into components of different spectral kind (with different spectral indices) is proposed. Presence of a signal caused by stochastic gravitational waves in spectral components is tested with the two-point angular correlation function as proposed in the pulsar timing array. This new approach was applied to timing data of a few millisecond pulsars and allowed to detect a signature similar to one predicted for gravitational wave background at relatively high confidence level: correlation coefficient between experimental and theoretical two-point correlations $\rho=0.82\pm 0.07$.

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