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  Cosmological Inference using Gravitational Wave Standard Sirens: A Mock Data Challenge

Gray, R., Hernandez, I. M., Qi, H., Sur, A., Brady, P. R., Chen, H.-Y., et al. (2020). Cosmological Inference using Gravitational Wave Standard Sirens: A Mock Data Challenge. Physical Review D: Particles, Fields, Gravitation, and Cosmology, 101(12): 122001. doi:10.1103/PhysRevD.101.122001.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-CCA7-A Version Permalink: http://hdl.handle.net/21.11116/0000-0006-96F3-E
Genre: Journal Article

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 Creators:
Gray, Rachel, Author
Hernandez, Ignacio Magaña, Author
Qi, Hong, Author
Sur, Ankan, Author
Brady, Patrick R., Author
Chen, Hsin-Yu, Author
Farr, Will M., Author
Fishbach, Maya, Author
Gair, Jonathan1, Author              
Ghosh, Archisman, Author
Holz, Daniel E., Author
Mastrogiovanni, Simone, Author
Messenger, Christopher, Author
Steer, Danièle A., Author
Veitch, John, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: The observation of binary neutron star merger GW170817, along with its optical counterpart, provided the first constraint on the Hubble constant $H_0$ using gravitational wave standard sirens. When no counterpart is identified, a galaxy catalog can be used to provide complementary redshift information. However, the true host might not be contained in a catalog which is not complete out to the limit of gravitational-wave detectability. These electromagnetic and gravitational-wave selection effects must be accounted for. We describe and implement a method to estimate $H_0$ using both the counterpart and the galaxy catalog standard siren methods. We perform a series of mock data challenges using binary neutron star mergers to confirm our ability to recover an unbiased estimate of $H_0$. Our simulations used a simplified universe with no redshift uncertainties or galaxy clustering, but with different magnitude-limited catalogs and assumed host galaxy properties, to test our treatment of both selection effects. We explore how the incompleteness of catalogs affects the final measurement of $H_0$, as well as the effect of weighting each galaxy's likelihood of being a host by its luminosity. In our most realistic simulation, where the simulated catalog is about three times denser than the density of galaxies in the local universe, we find that a 4.4\% measurement precision can be reached using galaxy catalogs with 50\% completeness and 249 binary neutron star detections with sensitivity similar to that of Advanced LIGO's second observing run.

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 Dates: 2019-08-162019-10-042020
 Publication Status: Published in print
 Pages: 19 pages, 8 figures
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 Rev. Method: -
 Identifiers: arXiv: 1908.06050
URI: http://arxiv.org/abs/1908.06050
DOI: 10.1103/PhysRevD.101.122001
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Title: Physical Review D: Particles, Fields, Gravitation, and Cosmology
Source Genre: Journal
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Pages: - Volume / Issue: 101 (12) Sequence Number: 122001 Start / End Page: - Identifier: -