Nano-Hertz Gravitational Waves Searches with Interferometric Pulsar Timing Experiments

Details Nano-Hertz Gravitational Waves Searches with Interferometric Pulsar Timing Experiments Nano-Hertz Gravitational Waves Searches with Interferometric Pulsar Timing Experiments

2011-01-20

arxiv.org/abs/1101.3990v1

Phys.Rev.Lett.106:191101,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Paper submitted to Phys. Rev. Letters. It is 9 pages long, and includes 2 figures

Scientific paper

10.1103/PhysRevLett.106.191101

We estimate the sensitivity to nano-Hertz gravitational waves of pulsar timing experiments in which two highly-stable millisecond pulsars are tracked simultaneously with two neighboring radio telescopes that are referenced to the same time-keeping subsystem (i.e. "the clock"). By taking the difference of the two time-of-arrival residual data streams we can exactly cancel the clock noise in the combined data set, thereby enhancing the sensitivity to gravitational waves. We estimate that, in the band ($10^{-9} - 10^{-8}$) Hz, this "interferometric" pulsar timing technique can potentially improve the sensitivity to gravitational radiation by almost two orders of magnitude over that of single-telescopes. Interferometric pulsar timing experiments could be performed with neighboring pairs of antennas of the forthcoming large arraying projects.

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