Dark Energy Survey Year 1 Results: Cross-correlation between Dark Energy Survey Y1 galaxy weak lensing and South Pole Telescope +Planck CMB weak lensing
| Autor: | Santiago Avila, Jorge Carretero, Gabrielle Simard, Juan De Vicente-Albendea, Pauline Vielzeuf, Chihway Chang, Markus Michael Rau, Juan Garcia-Bellido, Dragan Huterer, Michael Troxel, Filipe Abdalla, Ignacio Sevilla Noarbe, Marco Gatti, Luiz Da Costa, NILS WILLIAM HALVERSON, John Ruhl, Gregory Tarlé, Elizabeth George, Antony Stark, Ryan Chown, Aurelio Carnero Rosell, Bradford Benson, Daniel Gruen, Enrique Gaztanaga, Lindsey Bleem, Carles Sánchez, Clarence Chang, Andrés Alejandro Plazas Malagón, Eric Baxter, Alex Alarcon Gonzalez, Scott Dodelson, Kimmy Wu, Matias Carrasco Kind, Elisabeth Krause, Matt Dobbs, Emmanuel Bertin, Felipe Menanteau, Vinu Vikraman, Jochen Weller, Herman Diehl, Judit Prat, Gary Bernstein, Eduardo Rozo |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
010308 nuclear & particles physics Cosmic microwave background Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences Galaxy Cosmology Redshift symbols.namesake South Pole Telescope 0103 physical sciences symbols Dark energy Planck 010306 general physics Weak gravitational lensing |
| Zdroj: | Physical Review D. 100 |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | We cross-correlate galaxy weak lensing measurements from the Dark Energy Survey (DES) year-one data with a cosmic microwave background (CMB) weak lensing map derived from South Pole Telescope (SPT) and Planck data, with an effective overlapping area of 1289 deg2. With the combined measurements from four source galaxy redshift bins, we obtain a detection significance of 5.8σ. We fit the amplitude of the correlation functions while fixing the cosmological parameters to a fiducial ΛCDM model, finding A=0.99±0.17. We additionally use the correlation function measurements to constrain shear calibration bias, obtaining constraints that are consistent with previous DES analyses. Finally, when performing a cosmological analysis under the ΛCDM model, we obtain the marginalized constraints of ωm=0.261-0.051+0.070 and S8σ8ωm/0.3=0.660-0.100+0.085. These measurements are used in a companion work that presents cosmological constraints from the joint analysis of two-point functions among galaxies, galaxy shears, and CMB lensing using DES, SPT, and Planck data. |
| Databáze: | OpenAIRE |
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