scholarly journals Dark Energy Survey Year 1 Results: Cosmological constraints from cluster abundances and weak lensing

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
T. M. C. Abbott ◽  
M. Aguena ◽  
A. Alarcon ◽  
S. Allam ◽  
S. Allen ◽  
...  
Keyword(s):  
Dark Energy ◽  
Weak Lensing ◽  
Cosmological Constraints ◽  
Dark Energy Survey ◽  
Energy Survey

scholarly journals Dark Energy Survey Year 3 results: Cosmological constraints from galaxy clustering and weak lensing

2022 ◽  
Vol 105 (2) ◽  
Author(s):  
T. M. C. Abbott ◽  
M. Aguena ◽  
A. Alarcon ◽  
S. Allam ◽  
O. Alves ◽  
...  
Keyword(s):  
Dark Energy ◽  
Weak Lensing ◽  
Galaxy Clustering ◽  
Cosmological Constraints ◽  
Dark Energy Survey ◽  
Energy Survey

scholarly journals Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
T. M. C. Abbott ◽  
F. B. Abdalla ◽  
A. Alarcon ◽  
J. Aleksić ◽  
S. Allam ◽  
...  
Keyword(s):  
Dark Energy ◽  
Weak Lensing ◽  
Galaxy Clustering ◽  
Cosmological Constraints ◽  
Dark Energy Survey ◽  
Energy Survey

scholarly journals Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data

2019 ◽  
Vol 485 (1) ◽  
pp. 69-87 ◽  
Author(s):  
C Stern ◽  
J P Dietrich ◽  
S Bocquet ◽  
D Applegate ◽  
J J Mohr ◽  
...  
Keyword(s):  
Dark Energy ◽  
Galaxy Clusters ◽  
Weak Lensing ◽  
Dark Energy Survey ◽  
Energy Survey

scholarly journals Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

2018 ◽  
Vol 478 (1) ◽  
pp. 592-610 ◽  
Author(s):  
B Hoyle ◽  
D Gruen ◽  
G M Bernstein ◽  
M M Rau ◽  
J De Vicente ◽  
...  
Keyword(s):  
Dark Energy ◽  
Weak Lensing ◽  
Dark Energy Survey ◽  
Energy Survey

scholarly journals Dark Energy Survey Year 1 results: the impact of galaxy neighbours on weak lensing cosmology with im3shape

2017 ◽  
Vol 475 (4) ◽  
pp. 4524-4543 ◽  
Author(s):  
S Samuroff ◽  
S L Bridle ◽  
J Zuntz ◽  
M A Troxel ◽  
D Gruen ◽  
...  
Keyword(s):  
Dark Energy ◽  
Weak Lensing ◽  
Dark Energy Survey ◽  
The Impact ◽  
Energy Survey

scholarly journals Dark Energy Survey Year 1 results: validation of weak lensing cluster member contamination estimates from P(z) decomposition

2019 ◽  
Vol 489 (2) ◽  
pp. 2511-2524 ◽  
Author(s):  
T N Varga ◽  
J DeRose ◽  
D Gruen ◽  
T McClintock ◽  
S Seitz ◽  
...  
Keyword(s):  
Dark Energy ◽  
Decomposition Method ◽  
Weak Lensing ◽  
Cluster Member ◽  
Photometric Redshift ◽  
Cluster Mass ◽  
Dark Energy Survey ◽  
Mass Calibration ◽  
The Masses ◽  
Energy Survey

ABSTRACT Weak lensing source galaxy catalogues used in estimating the masses of galaxy clusters can be heavily contaminated by cluster members, prohibiting accurate mass calibration. In this study, we test the performance of an estimator for the extent of cluster member contamination based on decomposing the photometric redshift P(z) of source galaxies into contaminating and background components. We perform a full scale mock analysis on a simulated sky survey approximately mirroring the observational properties of the Dark Energy Survey Year One observations (DES Y1), and find excellent agreement between the true number profile of contaminating cluster member galaxies in the simulation and the estimated one. We further apply the method to estimate the cluster member contamination for the DES Y1 redMaPPer cluster mass calibration analysis, and compare the results to an alternative approach based on the angular correlation of weak lensing source galaxies. We find indications that the correlation based estimates are biased by the selection of the weak lensing sources in the cluster vicinity, which does not strongly impact the P(z) decomposition method. Collectively, these benchmarks demonstrate the strength of the P(z) decomposition method in alleviating membership contamination and enabling highly accurate cluster weak lensing studies without broad exclusion of source galaxies, thereby improving the total constraining power of cluster mass calibration via weak lensing.

scholarly journals KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs

2020 ◽  
Vol 634 ◽  
pp. A127 ◽  
Author(s):  
Marika Asgari ◽  
Tilman Tröster ◽  
Catherine Heymans ◽  
Hendrik Hildebrandt ◽  
Jan Luca van den Busch ◽  
...  
Keyword(s):  
Dark Energy ◽  
Mode Analysis ◽  
Small Scale ◽  
Microwave Background ◽  
Cosmological Constraints ◽  
Dark Energy Survey ◽  
Matter Power Spectrum ◽  
Λcdm Model ◽  
Cosmic Shear ◽  
Energy Survey

We present cosmological constraints from a joint cosmic shear analysis of the Kilo-Degree Survey (KV450) and the Dark Energy Survey (DES-Y1), which were conducted using Complete Orthogonal Sets of E/B-Integrals (COSEBIs). With COSEBIs, we isolated any B-modes that have a non-cosmic shear origin and demonstrate the robustness of our cosmological E-mode analysis as no significant B-modes were detected. We highlight how COSEBIs are fairly insensitive to the amplitude of the non-linear matter power spectrum at high k-scales, mitigating the uncertain impact of baryon feedback in our analysis. COSEBIs, therefore, allowed us to utilise additional small-scale information, improving the DES-Y1 joint constraints on S8 = σ8(Ωm/0.3)0.5 and Ωm by 20%. By adopting a flat ΛCDM model we find S8 = 0.755−0.021+0.019, which is in 3.2σ tension with the Planck Legacy analysis of the cosmic microwave background.

scholarly journals Redshift distributions of galaxies in the Dark Energy Survey Science Verification shear catalogue and implications for weak lensing

2016 ◽  
Vol 94 (4) ◽  
Author(s):  
C. Bonnett ◽  
M. A. Troxel ◽  
W. Hartley ◽  
A. Amara ◽  
B. Leistedt ◽  
...  
Keyword(s):  
Dark Energy ◽  
Weak Lensing ◽  
Dark Energy Survey ◽  
Energy Survey
Sign in / Sign up

Export Citation Format

Share Document