Measuring the Hubble constant using gravitational waves

Second-generation ground-based laser interferometers are expected to deliver a wealth of gravitational waves (GW) events from coalescing compact binaries up to a redshift of about 0.3. Being free of the systematics affecting electromagnetic measurements, GW offer the possibility of an independent me...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 484; no. 1; pp. 12030 - 4
Main Author Del Pozzo, W
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2014
Subjects
Bayesian analysis
Coalescing
Electromagnetic measurement
Gravitational waves
Hubble constant
Interferometers
Lasers
Networks
Optical counterparts (astronomy)
Physics
Red shift
Sky
Statistical inference
Uncertainty
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Summary:Second-generation ground-based laser interferometers are expected to deliver a wealth of gravitational waves (GW) events from coalescing compact binaries up to a redshift of about 0.3. Being free of the systematics affecting electromagnetic measurements, GW offer the possibility of an independent measurement of H0. This paper presents a method based on Bayesian inference aimed at estimating the value of the cosmological parameters for any GW event. In contrast to earlier work, this framework does not require the precise identification of the putative optical counterpart, but it considers all the potential galaxy hosts consistent with the recovered sky position and distance posterior distributions. When applied to the upcoming network of second generation interferometers, 50 GW events will yield a measurement of H0 with an uncertainty of a few per cents.
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ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/484/1/012030