Joint measurement of lensing–galaxy correlations using SPT and DES SV data

Baxter, E, Clampitt, J, Giannantonio, T, Dodelson, S, Jain, B, Huterer, D, Bleem, L, Crawford, T, Efstathiou, G, Fosalba, P, Kirk, D, Kwan, J, Sánchez, C, Story, K, Troxel, M A, Abbott, T M C, Abdalla, F B, Armstrong, R, Benoit-Lévy, A, Benson, B, Bernstein, G M, Bernstein, R A, Bertin, E, Brooks, D, Carlstrom, J, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Chown, R, Crocce, M, Cunha, C E, da Costa, L N, Desai, S, Diehl, H T, Dietrich, J P, Doel, P, Evrard, A E, Fausti Neto, A, Flaugher, B, Frieman, J, Gruen, D, Gruendl, R A, Gutierrez, G, de Haan, T, Holder, G, Honscheid, K, Hou, Z, James, D J, Kuehn, K, Kuropatkin, N, Lima, M, March, M, Marshall, J L, Martini, P, Melchior, P, Miller, C J, Miquel, R, Mohr, J J, Nord, B, Omori, Y, Plazas, A A, Reichardt, C, Romer, A K, Rykoff, E S, Sanchez, E, Sevilla-Noarbe, I, Sheldon, E, Smith, R C, Soares-Santos, M, Sobreira, F, Suchyta, E, Stark, A, Swanson, M E C, Tarle, G, Thomas, D, Walker, A R and Wechsler, R H (2016) Joint measurement of lensing–galaxy correlations using SPT and DES SV data. Monthly Notices of the Royal Astronomical Society, 461 (4). pp. 4099-4114. ISSN 0035-8711

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Abstract

We measure the correlation of galaxy lensing and cosmic microwave background lensing with a set of galaxies expected to trace the matter density field. The measurements are performed using pre-survey Dark Energy Survey (DES) Science Verification optical imaging data and millimetre-wave data from the 2500 sq. deg. South Pole Telescope Sunyaev–Zel'dovich (SPT-SZ) survey. The two lensing–galaxy correlations are jointly fit to extract constraints on cosmological parameters, constraints on the redshift distribution of the lens galaxies, and constraints on the absolute shear calibration of DES galaxy-lensing measurements. We show that an attractive feature of these fits is that they are fairly insensitive to the clustering bias of the galaxies used as matter tracers. The measurement presented in this work confirms that DES and SPT data are consistent with each other and with the currently favoured Λ cold dark matter cosmological model. It also demonstrates that joint lensing–galaxy correlation measurement considered here contains a wealth of information that can be extracted using current and future surveys.

Item Type: Article
Keywords: gravitational lensing: weak – cosmic background radiation – large-scale structure of the Universe
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Astronomy Centre
Subjects: Q Science > QB Astronomy
Depositing User: Richard Chambers
Date Deposited: 01 Nov 2016 12:06
Last Modified: 07 Mar 2017 09:20
URI: http://sro.sussex.ac.uk/id/eprint/63742

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