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  Calibrating the cosmic distance ladder using gravitational-wave observations

Gupta, A., Fox, D., Sathyaprakash, B. S., & Schutz, B. F. (2019). Calibrating the cosmic distance ladder using gravitational-wave observations. The Astrophysical Journal, 886(1): 71. doi:10.3847/1538-4357/ab4c92.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-5A63-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-5A67-3
Genre: Journal Article

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 Creators:
Gupta , Anuradha, Author
Fox, Derek, Author
Sathyaprakash, B. S., Author
Schutz, B. F.1, Author              
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc
 Abstract: Type Ia supernovae (SNe Ia) are among preeminent distance ladders for precision cosmology due to their intrinsic brightness, which allows them to be observable at high redshifts. Their usefulness as unbiased estimators of absolute cosmological distances however depends on accurate understanding of their intrinsic brightness, or anchoring their distance scale. This knowledge is based on calibrating their distances with Cepheids. Gravitational waves from compact binary coalescences, being standard sirens, can be used to validate distances to SNe Ia, when both occur in the same galaxy or galaxy cluster. The current measurement of distances by the advanced LIGO and Virgo detector network suffers from large statistical errors ($\sim 50\%$). However, we find that using a third generation gravitational-wave detector network, standard sirens will allow us to measure distances with an accuracy of $\sim 0.1\%$-$3\%$ for sources within $\le300$ Mpc. These are much smaller than the dominant systematic error of $\sim 5\%$ due to radial peculiar velocity of host galaxies. Therefore, gravitational-wave observations could soon add a new cosmic distance ladder for an independent calibration of distances to SNe Ia.

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 Dates: 2019-07-232019-10-082019
 Publication Status: Published in print
 Pages: 13 pages, 11 figures; v2: revised version after incorporating referee's comments, matches the version accepted in ApJ
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 Identifiers: arXiv: 1907.09897
DOI: 10.3847/1538-4357/ab4c92
URI: http://arxiv.org/abs/1907.09897
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Title: The Astrophysical Journal
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Pages: - Volume / Issue: 886 (1) Sequence Number: 71 Start / End Page: - Identifier: -