Dark Energy Survey Year 1 results: Curved-sky weak lensing mass map

DES Collaboration

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We construct the largest curved-sky galaxy weak lensing mass map to date from the DES firstyear (DES Y1) data. The map, about 10 times larger than the previous work, is constructed over a contiguous ≈1500 deg2, covering a comoving volume of ≈10 Gpc3. The effects of masking, sampling, and noise are tested using simulations. We generate weak lensing maps from two DES Y1 shear catalogues, METACALIBRATION and IM3SHAPE, with sources at redshift 0.2 < z < 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 map and the B-mode map is ~1.5 (~2) when smoothed with a Gaussian filter of sG = 30 (80) arcmin. The second and third moments of the convergence κ in the maps are in agreement with simulations. We also find no significant correlation of κ 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.

Original languageEnglish (US)
Pages (from-to)3165-3190
Number of pages26
JournalMonthly Notices of the Royal Astronomical Society
Volume475
Issue number3
DOIs
StatePublished - Apr 1 2018

Fingerprint

dark energy
sky
energy
masking
void
cross correlation
catalogs
simulation
tracers
contaminants
voids
coverings
tracer
sampling
galaxies
shear
filter
moments
filters
pollutant

Keywords

  • Dark matter
  • Gravitational lensing: weak
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Dark Energy Survey Year 1 results : Curved-sky weak lensing mass map. / DES Collaboration.

In: Monthly Notices of the Royal Astronomical Society, Vol. 475, No. 3, 01.04.2018, p. 3165-3190.

Research output: Contribution to journalArticle

@article{1c8ceecd38ba4f589f53047880781ff9,
title = "Dark Energy Survey Year 1 results: Curved-sky weak lensing mass map",
abstract = "We construct the largest curved-sky galaxy weak lensing mass map to date from the DES firstyear (DES Y1) data. The map, about 10 times larger than the previous work, is constructed over a contiguous ≈1500 deg2, covering a comoving volume of ≈10 Gpc3. The effects of masking, sampling, and noise are tested using simulations. We generate weak lensing maps from two DES Y1 shear catalogues, METACALIBRATION and IM3SHAPE, with sources at redshift 0.2 < z < 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 map and the B-mode map is ~1.5 (~2) when smoothed with a Gaussian filter of sG = 30 (80) arcmin. The second and third moments of the convergence κ in the maps are in agreement with simulations. We also find no significant correlation of κ 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.",
keywords = "Dark matter, Gravitational lensing: weak, Surveys",
author = "{DES Collaboration} and C. Chang and A. Pujol and B. Mawdsley and D. Bacon and J. Elvin-Poole and P. Melchior and A. Kov{\'a}cs and B. Jain and B. Leistedt and T. Giannantonio and A. Alarcon and E. Baxter and K. Bechtol and Becker, {M. R.} and A. Benoit-L{\'e}vy and Bernstein, {G. M.} and C. Bonnett and Busha, {M. T.} and Rosell, {A. Carnero} and Castander, {F. J.} and R. Cawthon and {da Costa}, {L. N.} and C. Davis and {De Vicente}, J. and J. DeRose and A. Drlica-Wagner and P. Fosalba and M. Gatti and E. Gaztanaga and D. Gruen and J. Gschwend and Hartley, {W. G.} and B. Hoyle and Huff, {E. M.} and M. Jarvis and N. Jeffrey and T. Kacprzak and H. Lin and N. MacCrann and Maia, {M. A.G.} and Ogando, {R. L.C.} and J. Prat and Rau, {M. M.} and Rollins, {R. P.} and A. Roodman and Eduardo Rozo and Rykoff, {E. S.} and S. Samuroff and C. S{\'a}nchez and I. Sevilla-Noarbe",
year = "2018",
month = "4",
day = "1",
doi = "10.1093/mnras/stx3363",
language = "English (US)",
volume = "475",
pages = "3165--3190",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

TY - JOUR

T1 - Dark Energy Survey Year 1 results

T2 - Curved-sky weak lensing mass map

AU - DES Collaboration

AU - Chang, C.

AU - Pujol, A.

AU - Mawdsley, B.

AU - Bacon, D.

AU - Elvin-Poole, J.

AU - Melchior, P.

AU - Kovács, A.

AU - Jain, B.

AU - Leistedt, B.

AU - Giannantonio, T.

AU - Alarcon, A.

AU - Baxter, E.

AU - Bechtol, K.

AU - Becker, M. R.

AU - Benoit-Lévy, A.

AU - Bernstein, G. M.

AU - Bonnett, C.

AU - Busha, M. T.

AU - Rosell, A. Carnero

AU - Castander, F. J.

AU - Cawthon, R.

AU - da Costa, L. N.

AU - Davis, C.

AU - De Vicente, J.

AU - DeRose, J.

AU - Drlica-Wagner, A.

AU - Fosalba, P.

AU - Gatti, M.

AU - Gaztanaga, E.

AU - Gruen, D.

AU - Gschwend, J.

AU - Hartley, W. G.

AU - Hoyle, B.

AU - Huff, E. M.

AU - Jarvis, M.

AU - Jeffrey, N.

AU - Kacprzak, T.

AU - Lin, H.

AU - MacCrann, N.

AU - Maia, M. A.G.

AU - Ogando, R. L.C.

AU - Prat, J.

AU - Rau, M. M.

AU - Rollins, R. P.

AU - Roodman, A.

AU - Rozo, Eduardo

AU - Rykoff, E. S.

AU - Samuroff, S.

AU - Sánchez, C.

AU - Sevilla-Noarbe, I.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - We construct the largest curved-sky galaxy weak lensing mass map to date from the DES firstyear (DES Y1) data. The map, about 10 times larger than the previous work, is constructed over a contiguous ≈1500 deg2, covering a comoving volume of ≈10 Gpc3. The effects of masking, sampling, and noise are tested using simulations. We generate weak lensing maps from two DES Y1 shear catalogues, METACALIBRATION and IM3SHAPE, with sources at redshift 0.2 < z < 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 map and the B-mode map is ~1.5 (~2) when smoothed with a Gaussian filter of sG = 30 (80) arcmin. The second and third moments of the convergence κ in the maps are in agreement with simulations. We also find no significant correlation of κ 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.

AB - We construct the largest curved-sky galaxy weak lensing mass map to date from the DES firstyear (DES Y1) data. The map, about 10 times larger than the previous work, is constructed over a contiguous ≈1500 deg2, covering a comoving volume of ≈10 Gpc3. The effects of masking, sampling, and noise are tested using simulations. We generate weak lensing maps from two DES Y1 shear catalogues, METACALIBRATION and IM3SHAPE, with sources at redshift 0.2 < z < 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 map and the B-mode map is ~1.5 (~2) when smoothed with a Gaussian filter of sG = 30 (80) arcmin. The second and third moments of the convergence κ in the maps are in agreement with simulations. We also find no significant correlation of κ 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.

KW - Dark matter

KW - Gravitational lensing: weak

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=85042408618&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042408618&partnerID=8YFLogxK

U2 - 10.1093/mnras/stx3363

DO - 10.1093/mnras/stx3363

M3 - Article

AN - SCOPUS:85042408618

VL - 475

SP - 3165

EP - 3190

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -