Skip to content

The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: a multi-tracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate

Research output: Contribution to journalArticlepeer-review

  • Gong-Bo Zhao
  • Yuting Wang
  • Atsushi Taruya
  • Weibing Zhang
  • Hector Gil-Marin
  • Arnaud de Mattia
  • Ashley J. Ross
  • Anand Raichoor
  • Cheng Zhao
  • Will J. Percival
  • Shadab Alam
  • Julian E. Bautista
  • Etienne Burtin
  • Chia-Hsun Chuang
  • Jiamin Hou
  • Kyle S. Dawson
  • Jean-Paul Kneib
  • Helion du Mas des Bourboux
  • Eva-Maria Mueller
  • Jeffrey A. Newman
  • John A. Peacock
  • Graziano Rossi
  • Vanina Ruhlmann-Kleider
  • Donald P. Schneider
  • Arman Shafieloo
We perform a joint BAO and RSD analysis using the eBOSS DR16 LRG and ELG samples in the redshift range of z ∈ [0.6, 1.1], and detect a RSD signal from the cross power spectrum at a ∼4σ confidence level, i.e., fσ8 = 0.317 ± 0.080 at zeff = 0.77. Based on the chained power spectrum, which is a new development in this work to mitigate the angular systematics, we measure the BAO distances and growth rate simultaneously at two effective redshifts, namely, DM/rd (z = 0.70) = 17.96 ± 0.51, DH/rd (z = 0.70) = 21.22 ± 1.20, fσ8 (z = 0.70) = 0.43 ± 0.05, and DM/rd (z = 0.845) = 18.90 ± 0.78, DH/rd (z = 0.845) = 20.91 ± 2.86, fσ8 (z = 0.845) = 0.30 ± 0.08. Combined with BAO measurements including those from the eBOSS DR16 QSO and Lyman-α sample, our measurement has raised the significance level of a nonzero ΩΛ to ∼11σ. The data product of this work is publicly available at https://github.com/icosmology/eBOSS_DR16_LRGxELG and https://www.sdss.org/science/final-bao-and-rsd-measurements/
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Early online date24 Mar 2021
DOIs
Publication statusEarly online - 24 Mar 2021

Documents

  • Zhao_et_al_2021_AAM

    Rights statement: This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review. The version of record Zhao, et al, The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: a multi-tracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate, Monthly Notices of the Royal Astronomical Society, 2021; Ahead of print, stab849, is available online at: https://doi.org/10.1093/mnras/stab849.

    Accepted author manuscript (Post-print), 4.91 MB, PDF document

Related information

Relations Get citation (various referencing formats)

ID: 26982231