In:
Journal of Cosmology and Astroparticle Physics, IOP Publishing, Vol. 2014, No. 05 ( 2014-05-01), p. 027-027
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) r s ) = 9.0±0.3 and across the line of sight D A ( z = 2.36)/ r s = 10.8±0.4, consistent with CMB and other BAO data. Using the best fit value of the sound horizon from Planck data ( r s = 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.
Type of Medium:
Online Resource
ISSN:
1475-7516
DOI:
10.1088/1475-7516/2014/05/027
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2014
detail.hit.zdb_id:
2104147-7
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