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Title: Dark Energy Survey Year 1 Results: Curved-Sky Weak Lensing Mass Map

Journal Article · · Monthly Notices of the Royal Astronomical Society
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We construct the largest curved-sky galaxy weak lensing mass map to date from the DES first-year (DES Y1) data. The map, about 10 times larger than previous work, is constructed over a contiguous $$\approx1,500 $$deg$^2$, covering a comoving volume of $$\approx10 $$Gpc$^3$. The effects of masking, sampling, and noise are tested using simulations. We generate weak lensing maps from two DES Y1 shear catalogs, Metacalibration and Im3shape, with sources at redshift $0.2<1.3,$ and in each of four bins in this range. In the highest signal-to-noise map, the ratio between the mean signal-to-noise in the E-mode and the B-mode map is $$\sim$$1.5 ($$\sim$$2) when smoothed with a Gaussian filter of $$\sigma_{G}=30$$ (80) arcminutes. The second and third moments of the convergence $$\kappa$$ in the maps are in agreement with simulations. We also find no significant correlation of $$\kappa$$ with maps of potential systematic contaminants. Finally, we demonstrate two applications of the mass maps: (1) cross-correlation with different foreground tracers of mass and (2) exploration of the largest peaks and voids in the maps.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Contributing Organization:
DES Collaboration
Grant/Contract Number:
SC0012704; AC02-07CH11359; AC05-00OR22725
OSTI ID:
1389249
Alternate ID(s):
OSTI ID: 1398806; OSTI ID: 1422380
Report Number(s):
BNL-114271-2017-JA; FERMILAB-PUB-17-295-AE; arXiv:1708.01535
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 475, Issue 3; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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Cited By (22)

Weak lensing peak statistics in the era of large scale cosmological surveys journal October 2018
Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS data text January 2017
Weak lensing by voids in weak lensing maps journal July 2018
C iv black hole mass measurements with the Australian Dark Energy Survey (OzDES) journal June 2019
Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear text January 2017
KiDS-450: Enhancing cosmic shear with clipping transformations text January 2018
Primordial power spectrum and cosmology from black-box galaxy surveys journal October 2019
KiDS-450: enhancing cosmic shear with clipping transformations journal August 2018
Dark Energy Survey Year 1 results: weak lensing mass calibration of redMaPPer galaxy clusters journal October 2018
Constraining primordial non-Gaussianity using two galaxy surveys and CMB lensing text January 2019
Cosmological N-body simulations: a challenge for scalable generative models journal December 2019
Cosmological N-body simulations: a challenge for scalable generative models preprint January 2019
Dark Energy Survey Year 1 Results: Weak Lensing Mass Calibration of redMaPPer Galaxy Clusters text January 2018
Weak lensing by voids in weak lensing maps text January 2018
Cosmological lensing ratios with DES Y1, SPT, and Planck journal May 2019
Dark Energy Survey Year 1 results: Cosmological constraints from cosmic shear journal August 2018
Improving weak lensing mass map reconstructions using Gaussian and sparsity priors: Application to DES SV text January 2018
CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES) text January 2019
Improving weak lensing mass map reconstructions using Gaussian and sparsity priors: application to DES SV journal May 2018
Cosmological N-body simulations: a challenge for scalable generative models text January 2019
Minkowski Functionals in Joint Galaxy Clustering & Weak Lensing Analyses text January 2022
Constraining primordial non-Gaussianity using two galaxy surveys and CMB lensing journal August 2019

Figures / Tables (20)

Table 1(p. 8)table Table 1
Figure 1(p. 9)figure Figure 1
Figure 2(p. 9)figure Figure 2
Figure 3(p. 10)figure Figure 3
Figure 4(p. 12)figure Figure 4
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Figure 10(p. 16)figure Figure 10
Figure 9(p. 16)figure Figure 9
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Figure 12(p. 19)figure Figure 12
Figure 13(p. 19)figure Figure 13
Figure Al(p. 22)figure Figure Al
Figure A2(p. 23)figure Figure A2
Figure A3(p. 24)figure Figure A3
Figure B1(p. 25)figure Figure B1
Figure B2(p. 26)figure Figure B2
Figure B3(p. 27)figure Figure B3

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
gravitational lensing: weak
surveys
dark matter