A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo
Name
Abbott_2021_ApJ_909_218.pdf
Description
Published version
Size
1.21 MB
Format
Adobe PDF
Checksum (MD5)
2077bc4c9f6379fe5cba0f2e8217fc68
Author(s)
Abbott, B. P.
Abbott, R.
Abbott, T. D.
Abraham, S.
Acernese, F.
Ackley, K.
Adams, C.
Adhikari, R. X.
Adya, V. B.
Affeldt, C.
Date Issued
March 1, 2021
Journal
Astrophysical Journal
Publisher
American Astronomical Society
Citation
Abbott, B. P., Abbott, R., Abbott, T. D., Abraham, S., Acernese, F. et al. 2021. "A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo." Astrophysical Journal, 909 (2).
Version
Final published version
Abstract
This paper presents the gravitational-wave measurement of the Hubble constant (H0) using the detections from the first and second observing runs of the Advanced LIGO and Virgo detector network. The presence of the transient electromagnetic counterpart of the binary neutron star GW170817 led to the first standard-siren measurement of H0. Here we additionally use binary black hole detections in conjunction with galaxy catalogs and report a joint measurement. Our updated measurement is H0 = ${69}_{-8}^{+16}$ km s−1 Mpc−1 (68.3% of the highest density posterior interval with a flat-in-log prior) which is an improvement by a factor of 1.04 (about 4%) over the GW170817-only value of ${69}_{-8}^{+17}$ km s−1 Mpc−1. A significant additional contribution currently comes from GW170814, a loud and well-localized detection from a part of the sky thoroughly covered by the Dark Energy Survey. With numerous detections anticipated over the upcoming years, an exhaustive understanding of other systematic effects are also going to become increasingly important. These results establish the path to cosmology using gravitational-wave observations with and without transient electromagnetic counterparts.
MIT Department
LIGO (Observatory : Massachusetts Institute of Technology)
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
10.3847/1538-4357/abdcb7
