Skip to content

Testing low-redshift cosmic acceleration with large-scale structure

Research output: Contribution to journalArticle

We examine the cosmological implications of measurements of the void-galaxy cross-correlation at redshift z = 0.57 combined with baryon acoustic oscillation (BAO) data at 0.1 < z < 2.4. We find direct evidence of the late-time acceleration due to dark energy at > 10σ significance from these data alone, independent of the cosmic microwave background and supernovae. Using a nucleosynthesis prior on Ωbh 2, we measure the Hubble constant to be H0 = 72.3±1.9 km s−1Mpc−1 from BAO+voids at z < 2, and H0 = 69.0 ± 1.2 km s−1Mpc−1 when adding Lyman-α BAO at z = 2.34, both independent of the CMB. Adding voids to CMB, BAO and supernova data greatly improves measurement of the dark energy equation of state, increasing the figure of merit by > 40%, but remaining consistent with flat Λ cold dark matter.
Original languageEnglish
JournalPhysical Review Letters
Publication statusAccepted for publication - 11 May 2020

Documents

  • 2001.11044v2

    Rights statement: The embargo end date of 2050 is a temporary measure until we know the publication date. Once we know the publication date the full text of this article will be able to view shortly afterwards.

    Accepted author manuscript (Post-print), 1.19 MB, PDF document

    Due to publisher’s copyright restrictions, this document is not freely available to download from this website until: 1/01/50

Relations Get citation (various referencing formats)

ID: 21001016