Detection of gravitational waves by pulsar timing

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

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1357...81r&link_type=abstract

RADIO PULSARS: AN ASTROPHYSICAL KEY TO UNLOCK THE SECRETS OF THE UNIVERSE. AIP Conference Proceedings, Volume 1357, pp. 81-84 (

Computer Science

Numerical Analysis

Stochastic Processes, Numerical Analysis, Frequency Measurement, Radio Telescopes, Stochastic Analysis, Numerical Simulation, Solution Of Equations, Time And Frequency, Radio Telescopes And Instrumentation, Heterodyne Receivers

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 ρ = 0.82+/-0.07.

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