Synapse
⌘+K
Synapse
PulseExploreClubsResearchersJournals
Instagram
HomeClubsExplore
March 23, 2017Astronomy and AstrophysicsOpen Access

Measurement of baryon acoustic oscillation correlations atz = 2.3 with SDSS DR12 Lyα-Forests

View Full Paper
Ask AI
Bookmark
Share

Authors

JBJulian BautistaNBNicolás G. BuscaJGJ. Guy

Discussion

Loading...

Member takes

Overview

Spectroscopic survey analysis reveals baryon acoustic oscillation distances in 157,783 quasar spectra, indicating consistency with flat-Lambda-CDM cosmological models.

Key Points

  • To measure the characteristic scale of baryon acoustic oscillations at redshift z ≈ 2.3 using flux-transmission correlations in the Lyman-alpha forest.
  • Analyzed flux-transmission correlation functions from spectra of 157,783 quasars spanning redshift 2.1 ≤ z ≤ 3.5 in the Sloan Digital Sky Survey Data Release 12.
  • Constructed a physical correlation model accounting for systematic errors, including unidentified high-density absorption systems and ultraviolet radiation fluctuations.
  • Measured Hubble distance relative to the sound horizon as DH(z = 2.33)/rd = 9.07 ± 0.31 and the distance combination DH^0.7 DM^0.3 / rd = 13.94 ± 0.35, which is 1.028 ± 0.026 times the flat-ΛCDM prediction.
  • Determined open-ΛCDM cosmological parameters in combination with other BAO measurements to be ΩM = 0.296 ± 0.029, ΩΛ = 0.699 ± 0.100, and Ωk = −0.002 ± 0.119.

Cite This Study

Bautista et al. (2017) studied this question.

synapsesocial.com/papers/6a7c93dd4ec837fd6928a0dfhttps://doi.org/10.1051/0004-6361/201730533
View Full Paper
Ask AI
Bookmark
Share

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Baryon acoustic scale at <i>z</i>eff = 0.166 with the SDSS blue galaxies2024 · 3 citations
  2. 2Dark Energy Survey: A 2.1% measurement of the angular Baryonic Acoustic Oscillation scale at redshift $z_{\rm eff}$=0.85 from the final dataset2024 · 4 citations
  3. 3Baryon acoustic scale at $z_{\eff} = 0.166$ with the SDSS blue galaxies2024
  4. 4DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars2024 · 67 citations
  5. 5Measurement of the photometric Baryon Acoustic Oscillations with self-calibrated redshift distribution2024 · 5 citations