The one-dimensional power spectrum from the SDSS DR14 Ly$\alpha$ forests

Solène Chabanier (1) , Nathalie Palanque-Delabrouille (1) , Christophe Yèche (1) , Jean-Marc Le Goff (1) , Eric Armengaud (1) , Julian Bautista , Michael Blomqvist (2) , Nicolas Busca (3) , Kyle Dawson , Thomas Etourneau (1) , Andreu Font-Ribera , Youngbae Lee , Hélion Du Mas Des Bourboux , Matthew Pieri (2) , James Rich (1) , Graziano Rossi , Donald Schneider , Anže Slosar

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 LAM - Laboratoire d'Astrophysique de Marseille
3 LPNHE (UMR_7585) - Laboratoire de Physique Nucléaire et de Hautes Énergies

We present a measurement of the 1D Lyα forest flux power spectrum, using the complete Baryon Oscillation Spectroscopic Survey (BOSS) and first extended-BOSS (eBOSS) quasars at zqso > 2.1, corresponding to the fourteenth data release (DR14) of the Sloan Digital Sky Survey (SDSS). Our results cover thirteen bins in redshift from zLyα = 2.2 to 4.6, and scales up to k = 0.02 (km/s)−1. From a parent sample of 180,413 visually inspected spectra, we selected the 43,751 quasars with the best quality; this data set improves the previous result from the ninth data release (DR9), both in statistical precision (achieving a reduction by a factor of two) and in redshift coverage. We also present a thorough investigation of identified sources of systematic uncertainties that affect the measurement. The resulting 1D power spectrum of this work is in excellent agreement with the one from the BOSS DR9 data.

Mots clés: Lyman alpha forest; power spectrum; redshift surveys

Domaines: Astrophysique [astro-ph]

Solène Chabanier, Nathalie Palanque-Delabrouille, Christophe Yèche, Jean-Marc Le Goff, Eric Armengaud, et al.. The one-dimensional power spectrum from the SDSS DR14 Ly$\alpha$ forests. JCAP, 2019, 07, pp.017. ⟨10.1088/1475-7516/2019/07/017⟩. ⟨hal-01974751⟩