Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14

Autor: Anže Slosar, Matthew M. Pieri, Christophe Balland, Nathalie Palanque-Delabrouille, Jean Marc Le Goff, Michael Blomqvist, C. Yeche, Kyle S. Dawson, Hélion du Mas des Bourboux, J. Bautista, Julien Guy, Donald P. Schneider, Ignasi Pérez-Ràfols, Will J. Percival, Axel de la Macorra, Victoria De Sainte Agathe, J. Rich, Andreu Font-Ribera, Nicolás G. Busca
Přispěvatelé: Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Utah, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, University College of London [London] (UCL), University of Portsmouth, Universidad Nacional Autónoma de México (UNAM), University of Waterloo [Waterloo], Pennsylvania State University (Penn State), Penn State System, Brookhaven National Laboratory [Upton, NY] (BNL), U.S. Department of Energy [Washington] (DOE)-UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), ANR under contract ANR-14-ACHN-0021, ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY)-U.S. Department of Energy [Washington] (DOE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Brookhaven National Laboratory, ANR-11-IDEX-0001-02/11-IDEX-0001,AMIDEX,AMIDEX(2011)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 629, pp.A85. ⟨10.1051/0004-6361/201935638⟩
Astronomy and Astrophysics-A&A, 2019, 629, pp.A85. ⟨10.1051/0004-6361/201935638⟩
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201935638⟩
Popis: We measure the imprint of primordial baryon acoustic oscillations (BAO) in the correlation function of Ly$\alpha$ absorption in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) and the extended BOSS (eBOSS) in Data Release 14 (DR14) of the Sloan Digital Sky Survey (SDSS)-IV. In addition to 179,965 spectra with absorption in the Lyman-$\alpha$ (Ly$\alpha$) region, we use, for the first time, Ly$\alpha$ absorption in the Lyman-$\beta$ region of 56,154 spectra. We measure the Hubble distance, $D_H$, and the comoving angular diameter distance, $D_M$, relative to the sound horizon at the drag epoch $r_d$ at an effective redshift $z=2.34$. Using a physical model of the correlation function outside the BAO peak, we find $D_H(2.34)/r_d=8.86\pm 0.29$ and $D_M(2.34)/r_d=37.41\pm 1.86$, within 1$\sigma$ from the flat-$\Lambda$CDM model consistent with CMB anisotropy measurements. With the addition of polynomial "broadband" terms, the results remain within one standard deviation of the CMB-inspired model. Combined with the quasar-Ly$\alpha$ cross-correlation measurement presented in a companion paper Blomqvist19, the BAO measurements at $z=2.35$ are within 1.7$\sigma$ of the predictions of this model.
Comment: accepted by A&A
Databáze: OpenAIRE
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