Will Gravitational Wave Sirens Determine the Hubble Constant? [Article]
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Date
2018-12-19
Authors
Shafieloo, Arman
Keeley, Ryan E.
Linder, Eric V.
Journal Title
Journal ISSN
Volume Title
Publisher
NURIS; Energetic Cosmos Laboratory
Abstract
Lack of knowledge about the background expansion history of the Universe from independent observations makes it problematic to obtain a precise and accurate estimation of the Hubble constant H0 from gravitational wave standard sirens, even with electromagnetic counterpart redshifts. Simply fitting simultaneously for the matter density in a flat \lcdm\ model can reduce the precision on H0 from 1\% to 5\%, while not knowing the actual background expansion model of the universe (e.g.\ form of dark energy) can introduce substantial bias in estimation of the Hubble constant. When the statistical precision is at the level of 1\% uncertainty on H0, biases in non-\lcdm\ cosmologies that are consistent with current data could reach the 3σ level. To avoid model-dependent biases, statistical techniques that are appropriately agnostic about model assumptions need to be employed.
Description
Energetic Cosmos Laboratory. ECL Publication, 2019
Keywords
The 2nd international conference of the Energetic Cosmos Laboratory (ECL), Energetic Cosmos Laboratory (ECL), ECL19
Citation
Shafieloo, A., Keeley, R.E. & Linder, E.V. (2019). Will Gravitational Wave Sirens Determine the Hubble Constant? The 2nd international conference of the Energetic Cosmos Laboratory (ECL) at Nazarbayev University. Retrieved from https://arxiv.org/pdf/1812.07775.pdf