Cosmography with the Einstein Telescope

Sathyaprakash, B. S.; Schutz, B. F.; Van den Broeck, C.

doi:10.1088/0264-9381/27/21/215006

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Cosmography with the Einstein Telescope

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Schutz, B. F.
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Sathyaprakash, B. S., Schutz, B. F., & Van den Broeck, C. (2010). Cosmography with the Einstein Telescope. Classical and quantum gravity, 27(21): 215006.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-2E94-B

Abstract

The Einstein Telescope, a third-generation gravitational-wave detector under a design study, could detect millions of binary neutron star inspirals each year. A small fraction of these events might be observed as gamma-ray bursts, helping to measure both the luminosity distance DL to and redshift z of the source. By fitting these measured values of DL and z to a cosmological model, it would be possible to infer the dark energy equation of state to within 1.5% without the need to correct for errors in DL caused by weak lensing. This compares favourably with 0.3–10% accuracy that can be achieved with the Laser Interferometer Space Antenna (where weak lensing will need to be dealt with) as well as with dedicated dark energy missions that have been proposed, where 3.5–11% uncertainty is expected.