Measuring a cosmological distance-redshift relationship using only gravitational wave observations of binary neutron star coalescences

Messenger, C. and Read, J. (2012) Measuring a cosmological distance-redshift relationship using only gravitational wave observations of binary neutron star coalescences. Physical Review Letters, 108(091101), 091101. (doi:10.1103/PhysRevLett.108.091101) (PMID:22463622)

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Abstract

Detection of gravitational waves from the inspiral phase of binary neutron star coalescence will allow us to measure the effects of the tidal coupling in such systems. Tidal effects provide additional contributions to the phase evolution of the gravitational wave signal that break a degeneracy between the system’s mass parameters and redshift and thereby allow the simultaneous measurement of both the effective distance and the redshift for individual sources. Using the population of Oð103–107Þ detectable binary neutron star systems predicted for 3rd generation gravitational wave detectors, the luminosity distance-redshift relation can be probed independently of the cosmological distance ladder and independently of electromagnetic observations. We conclude that for a range of representative neutron star equations of state the redshift of such systems can be determined to an accuracy of 8%–40% for z < 1 and 9%–65% for 1 <z< 4.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Messenger, Dr Christopher
Authors: Messenger, C., and Read, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
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