Cosmology from large scale galaxy clustering and galaxy-galaxy lensing with Dark Energy Survey Science Verification data
Abstract
We present cosmological constraints from the Dark Energy Survey (DES) using a combined analysis of angular clustering of red galaxies and their cross-correlation with weak gravitational lensing of background galaxies. We use a 139 square degree contiguous patch of DES data from the Science Verification (SV) period of observations. Using large scale measurements, we constrain the matter density of the Universe as Omega_m = 0.31 +/- 0.09 and the clustering amplitude of the matter power spectrum as sigma_8 = 0.74 +/- 0.13 after marginalizing over seven nuisance parameters and three additional cosmological parameters. This translates into S_8 = sigma_8(Omega_m/0.3)^{0.16} = 0.74 +/- 0.12 for our fiducial lens redshift bin at 0.35 <z< 0.5, while S_8 = 0.78 +/- 0.09 using two bins over the range 0.2 <z< 0.5. We study the robustness of the results under changes in the data vectors, modelling and systematics treatment, including photometric redshift and shear calibration uncertainties, and find consistency in the derived cosmological parameters. We show that our results are consistent with previous cosmological analyses from DES and other data sets and conclude with a joint analysis of DES angular clustering and galaxy-galaxy lensing with Planck CMB data, Baryon Accoustic Oscillations and Supernova type Ia measurements.
Keywords
Cite
@article{arxiv.1604.07871,
title = {Cosmology from large scale galaxy clustering and galaxy-galaxy lensing with Dark Energy Survey Science Verification data},
author = {Juliana Kwan and Carles Sanchez and Joseph Clampitt and Jonathan Blazek and Martin Crocce and Bhuvnesh Jain and Joe Zuntz and Adam Amara and Matthew Becker and Gary Bernstein and Christopher Bonnett and Joseph DeRose and Scott Dodelson and Tim Eifler and Enrique Gaztanaga and Tommaso Giannantonio and Daniel Gruen and Will Hartley and Tomasz Kacprzak and Donnacha Kirk and Elisabeth Krause and Niall MacCrann and Ramon Miquel and Youngsoo Park and Ashley Ross and Eduardo Rozo and Eli Rykoff and Erin Sheldon and Michael A. Troxel and Risa Wechsler and Tim Abbott and Filipe Abdalla and Sahar Allam and Aurélien Benoit-Lévy and David Brooks and David Burke and Aurelio Carnero Rosell and Matias Carrasco Kind and Carlos Cunha and Chris D'Andrea and Luiz da Costa and Shantanu Desai and H. Thomas Diehl and Jörg Dietrich and Peter Doel and August Evrard and Enrique Fernandez and David Finley and Brenna Flaugher and Pablo Fosalba and Josh Frieman and David Gerdes and Robert Gruendl and Gaston Gutierrez and Klaus Honscheid and David James and Mike Jarvis and Kyler Kuehn and Ofer Lahav and Marcos Lima and Marcio Maia and Jennifer Marshall and Paul Martini and Peter Melchior and Joe Mohr and Robert Nichol and Brian Nord and Andres Plazas and Kevin Reil and Kathy Romer and Aaron Roodman and Eusebio Sanchez and Vic Scarpine and Ignacio Sevilla and R. Chris Smith and Marcelle Soares-Santos and Flavia Sobreira and Eric Suchyta and Molly Swanson and Gregory Tarle and Daniel Thomas and Vinu Vikram and Alistair Walker},
journal= {arXiv preprint arXiv:1604.07871},
year = {2016}
}
Comments
18 pages, 13 figures, submitted to MNRAS