Search Publications
The clustering of the SDSS DR7 main Galaxy sample - I. A 4 per cent distance measure at z = 0.15
Howlett, Cullan; Manera, Marc; Ross, Ashley J. +3 more
We create a sample of spectroscopically identified galaxies with z < 0.2 from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7), covering 6813 deg2. Galaxies are chosen to sample the highest mass haloes, with an effective bias of 1.5, allowing us to construct 1000 mock galaxy catalogues (described in Paper II), which we use to…
Joint Analysis of BICEP2/Keck Array and Planck Data
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +277 more
We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg2 patch of sky centered on RA 0 h, Dec. -57.5 ° . The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polariz…
Baryon acoustic oscillations in the Lyα forest of BOSS DR11 quasars
Pâris, Isabelle; Petitjean, Patrick; Aubourg, Éric +35 more
We report a detection of the baryon acousticoscillation (BAO) feature in the flux-correlation function of the Lyα forest of high-redshift quasars with a statistical significance of five standard deviations. The study uses 137 562 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the data release 11 (DR11) of the Baryon Oscillation Spectroscopic Sur…
Cosmic Reionization and Early Star-forming Galaxies: A Joint Analysis of New Constraints from Planck and the Hubble Space Telescope
Ellis, Richard S.; Robertson, Brant E.; Dunlop, James S. +1 more
We discuss new constraints on the epoch of cosmic reionization and test the assumption that most of the ionizing photons responsible arose from high-redshift star-forming galaxies. Good progress has been made in charting the end of reionization through spectroscopic studies of z ≃ 6-8 QSOs, gamma-ray bursts, and galaxies expected to host Lyα emiss…
Cosmological implications of baryon acoustic oscillation measurements
Pâris, Isabelle; Petitjean, Patrick; Aubourg, Éric +93 more
We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) data and a recent reanalysis of Type Ia supernova (SN) data. In particular, we take advantage of high-precision BAO measurements from galaxy clustering and th…
Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-Square-Degree SPT-SZ Survey
Gladders, M. D.; Schrabback, T.; Rest, A. +71 more
We present a catalog of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect signature from 2500 deg2 of South Pole Telescope (SPT) data. This work represents the complete sample of clusters detected at high significance in the 2500 deg2 SPT-SZ survey, which was completed in 2011. A total of 677 (409) cluster can…
A Three-dimensional Map of Milky Way Dust
Tonry, John; Rix, Hans-Walter; Magnier, Eugene +13 more
We present a three-dimensional map of interstellar dust reddening, covering three-quarters of the sky out to a distance of several kiloparsecs, based on Pan-STARRS 1 (PS1) and 2MASS photometry. The map reveals a wealth of detailed structure, from filaments to large cloud complexes. The map has a hybrid angular resolution, with most of the map at a…
A search for ultralight axions using precision cosmological data
Hlozek, Renée; Grin, Daniel; Marsh, David J. E. +1 more
Ultralight axions (ULAs) with masses in the range 1 0-33 eV ≤ma≤1 0-20 eV are motivated by string theory and might contribute to either the dark-matter or dark-energy densities of the Universe. ULAs could suppress the growth of structure on small scales, lead to an altered integrated Sachs-Wolfe effect on cosmic mi…
Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +200 more
This paper presents an overview of the polarized sky as seen by Planck HFI at 353 GHz, which is the most sensitive Planck channel for dust polarization. We construct and analyse maps of dust polarization fraction and polarization angle at 1° resolution, taking into account noise bias and possible systematic effects. The sensitivity of the Planck H…
The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
Muzzin, Adam; Hoekstra, Henk; Babul, Arif +4 more
Masses of clusters of galaxies from weak gravitational lensing analyses of ever larger samples are increasingly used as the reference to which baryonic scaling relations are compared. In this paper we revisit the analysis of a sample of 50 clusters studied as part of the Canadian Cluster Comparison Project. We examine the key sources of systematic…