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29 March 2024
 
  » arxiv » 1708.1535

 Article overview


Dark Energy Survey Year 1 Results: Curved-Sky Weak Lensing Mass Map
C. Chang ; A. Pujol ; B. Mawdsley ; D. Bacon ; J. Elvin-Poole ; P. Melchior ; A. Kovács ; B. Jain ; B. Leistedt ; T. Giannantonio ; A. Alarcon ; E. Baxter ; K. Bechtol ; M. R. Becker ; A. Benoit-Lévy ; G. M. Bernstein ; C. Bonnett ; M. T. Busha ; A. Carnero Rosell ; F. J. Castander ; R. Cawthon ; L. N. da Costa ; C. Davis ; J. De Vicente ; J. DeRose ; A. Drlica-Wagner ; P. Fosalba ; M. Gatti ; E. Gaztanaga ; D. Gruen ; J. Gschwend ; W. G. Hartley ; B. Hoyle ; E. M. Huff ; M. Jarvis ; N. Jeffrey ; T. Kacprzak ; H. Lin ; N. MacCrann ; M. A. G. Maia ; R. L. C. Ogando ; J. Prat ; M. M. Rau ; R. P. Rollins ; A. Roodman ; E. Rozo ; E. S. Rykoff ; S. Samuroff ; C. Sánchez ; I. Sevilla-Noarbe ; E. Sheldon ; M. A. Troxel ; T. N. Varga ; P. Vielzeuf ; V. Vikram ; R. H. Wechsler ; J. Zuntz ; T. M. C. Abbott ; F. B. Abdalla ; S. Allam ; J. Annis ; E. Bertin ; D. Brooks ; E. Buckley-Geer ; D. L. Burke ; M. Carrasco Kind ; J. Carretero ; M. Crocce ; C. E. Cunha ; C. B. D'Andrea ; S. Desai ; H. T. Diehl ; J. P. Dietrich ; P. Doel ; J. Estrada ; A. Fausti Neto ; E. Fernandez ; B. Flaugher ; J. Frieman ; J. García-Bellido ; R. A. Gruendl ; G. Gutierrez ; K. Honscheid ; D. J. James ; T. Jeltema ; M. W. G. Johnson ; M. D. Johnson ; S. Kent ; D. Kirk ; E. Krause ; K. Kuehn ; S. Kuhlmann ; O. Lahav ; T. S. Li ; M. Lima ; M. March ; P. Martini ; F. Menanteau ; R. Miquel ; J. J. Mohr ; E. Neilsen ; R. C. Nichol ; D. Petravick ; A. A. Plazas ; A. K. Romer ; M. Sako ; E. Sanchez ; V. Scarpine ; M. Schubnell ; M. Smith ; R. C. Smith ; M. Soares-Santos ; F. Sobreira ; E. Suchyta ; G. Tarle ; D. Thomas ; D. L. Tucker ; A. R. Walker ; W. Wester ; Y. Zhang ;
Date 4 Aug 2017
AbstractWe 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 $0.2<z<1.3,$ 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 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.
Source arXiv, 1708.1535
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