1. Quasar-Lyman α forest cross-correlation from BOSS DR11: Baryon Acoustic Oscillations
- Author
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Font-Ribera, A, Kirkby, D, Busca, N, Miralda-Escudé, J, Ross, NP, Slosar, A, Rich, J, Aubourg, E, Bailey, S, Bhardwaj, V, Bautista, J, Beutler, F, Bizyaev, D, Blomqvist, M, Brewington, H, Brinkmann, J, Brownstein, JR, Carithers, B, Dawson, KS, Delubac, T, Ebelke, G, Eisenstein, DJ, Ge, J, Kinemuchi, K, Lee, KG, Malanushenko, V, Malanushenko, E, Marchante, M, Margala, D, Muna, D, Myers, AD, Noterdaeme, P, Oravetz, D, Palanque-Delabrouille, N, Pâris, I, Petitjean, P, Pieri, MM, Rossi, G, Schneider, DP, Simmons, A, Viel, M, Yeche, C, and York, DG
- Subjects
Lyman alpha forest ,baryon acoustic oscillations ,redshift surveys ,dark energy experiments ,astro-ph.CO ,Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Nuclear & Particles Physics ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics - Abstract
We measure the large-scale cross-correlation of quasars with the Lyα forest absorption, using over 164,000 quasars from Data Release 11 of the SDSS-III Baryon Oscillation Spectroscopic Survey. We extend the previous study of roughly 60,000 quasars from Data Release 9 to larger separations, allowing a measurement of the Baryonic Acoustic Oscillation (BAO) scale along the line of sight c/(H(z = 2.36)rs) = 9.0±0.3 and across the line of sight DA (z = 2.36)/rs = 10.8±0.4, consistent with CMB and other BAO data. Using the best fit value of the sound horizon from Planck data (rs = 147.49 Mpc), we can translate these results to a measurement of the Hubble parameter of H(z = 2.36) = 226±8 km s -1 Mpc-1 and of the angular diameter distance of D A (z = 2.36) = 1590±60 Mpc. The measured cross-correlation function and an update of the code to fit the BAO scale (baofit) are made publicly available.©2014 IOP Publishing Ltd and Sissa Medialab srl.
- Published
- 2014