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Communication Dans Un Congrès Année : 2018

Baryon Acoustic Oscillation studies with the eBOSS quasar sample

Résumé

We present measurements of the Baryon Acoustic Oscillation (BAO) scale inredshift-space using the clustering of quasars. We consider a sample of 148,659quasars from the extended Baryon Oscillation Spectroscopic Survey (eBOSS)distributed over 2113 square degrees with redshifts 0.8 < z < 2.2 and measuretheir spherically-averaged clustering in both configuration and Fourier space.We detect a preference for a BAO signal greater than 2.8σ in the isotropic2-point correlation function and power spectrum, which we use to determine thespherically averaged BAO distance at z = 1.52 with 3.8 per cent precision: DV (z= 1.52) = 3843 ± 147 (rd/rd,fid) Mpc. This is the first time the location of theBAO feature has been measured between redshifts 1 and 2. All of our results areconsistent with basic large-scale structure (LSS) theory and previousobservations, confirming quasars to be a reliable tracer of LSS, and provide astarting point for numerous cosmological tests to be performed with eBOSS quasarsamples.
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Dates et versions

hal-02946211 , version 1 (22-09-2020)

Identifiants

  • HAL Id : hal-02946211 , version 1
  • INSPIRE : 1813471

Citer

Héctor Gil-Marín. Baryon Acoustic Oscillation studies with the eBOSS quasar sample. 53rd Rencontres de Moriond on Cosmology, Mar 2018, La Thuile, Italy. pp.3-6. ⟨hal-02946211⟩
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