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Pulsar Timing Array Experiments

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Handbook of Gravitational Wave Astronomy

Abstract

Pulsar timing is a technique that uses the highly stable spin periods of neutron stars to investigate a wide range of topics in physics and astrophysics. Pulsar timing arrays (PTAs) use sets of extremely well-timed pulsars as a galaxy-scale detector with arms extending between Earth and each pulsar in the array. These challenging experiments look for correlated deviations in the pulsars’ timing that are caused by low-frequency gravitational waves (GWs) traversing our galaxy. PTAs are particularly sensitive to GWs at nanohertz frequencies, which makes them complementary to other space- and ground-based detectors. In this chapter, we will describe the methodology behind pulsar timing; provide an overview of the potential uses of PTAs; and summarize where current PTA-based detection efforts stand. Most predictions expect PTAs to successfully detect a cosmological background of GWs emitted by supermassive black hole binaries and also potentially detect continuous-wave emission from binary supermassive black holes, within the next several years.

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  1. Fakultät für Physik, Universität Bielefeld, Bielefeld, Germany

    J. P. W. Verbiest

  2. Max-Planck-Institut für Radioastronomie, Bonn, Germany

    J. P. W. Verbiest

  3. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC, Australia

    S. Osłowski

  4. Department of Physics and Astronomy, West Virginia University, Morgantown, WV, USA

    S. Burke-Spolaor

  5. Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV, USA

    S. Burke-Spolaor

  6. Canadian Institute for Advanced Research, CIFAR Azrieli Global Scholar, Toronto, ON, Canada

    S. Burke-Spolaor

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Verbiest, J.P.W., Osłowski, S., Burke-Spolaor, S. (2021). Pulsar Timing Array Experiments. In: Bambi, C., Katsanevas, S., Kokkotas, K.D. (eds) Handbook of Gravitational Wave Astronomy. Springer, Singapore. https://doi.org/10.1007/978-981-15-4702-7_4-1

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