Hubble constant difference between CMB lensing and BAO measurements
Abstract
We apply a tension metric QUDM, the update difference in mean parameters, to understand the source of the difference in the measured Hubble constant H0 inferred with cosmic microwave background lensing measurements from the Planck satellite (H0 = $67.9$ $$^{+1.1}_{–1.3}$$ km/s/Mpc) and from the South Pole Telescope (H0 = $72.0$ $$^{+2.1}_{–2.5}$$ km/s/Mpc) when both are combined with baryon acoustic oscillation (BAO) measurements with priors on the baryon density (BBN). QUDM isolates the relevant parameter directions for tension or concordance where the two data sets are both informative, and aids in the identification of subsets of data that source the observed tension. With QUDM, we uncover that the difference in H0 is driven by the tension between Planck lensing and BAO+BBN, at probability-to-exceed of 6.6%. Most of this mild tension comes from the galaxy BAO measurements parallel to the line of sight in the redshift range 0.2 < z < 0.75. Here, the redshift dependence of the parallel BAOs pulls both the matter density Ωm and H0 high in Λ CDM, but these parameter anomalies are usually hidden when the BAO measurements are combined with other cosmological data sets with much stronger Ωm constraints.
- Authors:
-
- Univ. of Chicago, IL (United States)
- Univ. of Toronto, ON (Canada)
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Publication Date:
- Research Org.:
- Univ. of Chicago, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA); NNH17ZDA001N
- OSTI Identifier:
- 1734898
- Grant/Contract Number:
- SC0009924; PHY-1125897; FG02-13ER41958
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 102; Journal Issue: 2; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Cosmic microwave background; Cosmological parameters; Dark energy; Large scale structure of the Universe
Citation Formats
Wu, W. L. Kimmy, Motloch, Pavel, Hu, Wayne, and Raveri, Marco. Hubble constant difference between CMB lensing and BAO measurements. United States: N. p., 2020.
Web. doi:10.1103/physrevd.102.023510.
Wu, W. L. Kimmy, Motloch, Pavel, Hu, Wayne, & Raveri, Marco. Hubble constant difference between CMB lensing and BAO measurements. United States. https://doi.org/10.1103/physrevd.102.023510
Wu, W. L. Kimmy, Motloch, Pavel, Hu, Wayne, and Raveri, Marco. Tue .
"Hubble constant difference between CMB lensing and BAO measurements". United States. https://doi.org/10.1103/physrevd.102.023510. https://www.osti.gov/servlets/purl/1734898.
@article{osti_1734898,
title = {Hubble constant difference between CMB lensing and BAO measurements},
author = {Wu, W. L. Kimmy and Motloch, Pavel and Hu, Wayne and Raveri, Marco},
abstractNote = {We apply a tension metric QUDM, the update difference in mean parameters, to understand the source of the difference in the measured Hubble constant H0 inferred with cosmic microwave background lensing measurements from the Planck satellite (H0 = $67.9$ $^{+1.1}_{–1.3}$ km/s/Mpc) and from the South Pole Telescope (H0 = $72.0$ $^{+2.1}_{–2.5}$ km/s/Mpc) when both are combined with baryon acoustic oscillation (BAO) measurements with priors on the baryon density (BBN). QUDM isolates the relevant parameter directions for tension or concordance where the two data sets are both informative, and aids in the identification of subsets of data that source the observed tension. With QUDM, we uncover that the difference in H0 is driven by the tension between Planck lensing and BAO+BBN, at probability-to-exceed of 6.6%. Most of this mild tension comes from the galaxy BAO measurements parallel to the line of sight in the redshift range 0.2 < z < 0.75. Here, the redshift dependence of the parallel BAOs pulls both the matter density Ωm and H0 high in Λ CDM, but these parameter anomalies are usually hidden when the BAO measurements are combined with other cosmological data sets with much stronger Ωm constraints.},
doi = {10.1103/physrevd.102.023510},
journal = {Physical Review D},
number = 2,
volume = 102,
place = {United States},
year = {Tue Jul 07 00:00:00 EDT 2020},
month = {Tue Jul 07 00:00:00 EDT 2020}
}
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