Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies
Hoyle, B.1,34; Gruen, D.2,3; Bernstein, G. M.4; Rau, M. M.1; De Vicente, J.5; Hartley, G.6,7; Gaztanaga, E.8; DeRose, J.2,9; Troxel, M. A.10,11; Davis, C.2; Alarcon, A.8; MacCrann, N.10,11; Prat, J.12; Sanchez, C.12; Sheldon, E.13; Wechsler, R. H.2,3,9; Asorey, J.14,15; Becker, M. R.2,9; Bonnett, C.12; Rosell, A. Carnero16,17; Carollo, D.14,18; Kind, M. Carrasco19,20; Castander, F. J.8; Cawthon, R.21; Chang, C.21; Childress, M.22; Davis, T. M.14,15; Drlica-Wagner, A.23; Gatti, M.12; Glazebrook, K.24; Gschwend, J.16,17; Hinton, S. R.15; Hoormann, J. K.15; Kim, A. G.25; King, A.15; Kuehn, K.26; Lewis, G.14,27; Lidman, C.14,26; Lin, H.23; Macaulay, E.15; Maia, M. A. G.16,17; Martini, P.10,28; Mudd, D.28; Moller, A.14,29; Nichol, R. C.30; Ogando, R. L. C.16,17; Rollins, R. P.31; Roodman, A.2,3; Ross, A. J.10; Rozo, E.32; Rykoff, E. S.2,3; Samuroff, S.31; Sevilla-Noarbe, I.5; Sharp, R.29; Sommer, N. E.14,29; Tucker, B. E.14,29; Uddin, S. A.14,33; Varga, T. N.1,34; Vielzeuf, P.12; Yuan, F.14,29; Zhang, B.14,29; Abbott, T. M. C.35; Abdalla, F. B.6,36; Allam, S.23; Annis, J.23; Bechtol, K.37; Benoit-Levy, A.6,38,39; Bertin, E.38,39; Brooks, D.6; Buckley-Geer, E.23; Burke, L.2,3; Busha, M. T.2; Capozzi, D.30; Carretero, J.12; Crocce, M.8; D'Andrea, C. B.4; da Costa, L. N.16,17; Depoy, D. L.40,41; Desai, S.42; Diehl, H. T.23; Doel, P.6; Eifler, T. F.43,44; Estrada, J.23; Evrard, A. E.45,46; Fernandez, E.12; Flaugher, B.23; Fosalba, P.8; Frieman, J.21,23; Garcia-Bellido, J.47; Gerdes, D. W.45,46; Giannantonio, T.1,48,49; Goldstein, D. A.25,50; Gruendl, R. A.19,20; Gutierrez, G.23; Honscheid, K.10,11; James, D. J.51; Jarvis, M.4; Jeltema, T.52; Johnson, M. W. G.20; Johnson, M. D.20; Kirk, D.6; Krause, E.2; Kuhlmann, S.53; Kuropatkin, N.23; Lahav, O.6; Li, T. S.23; Lima, M.16,54; March, M.4; Marshall, L.40,41; Melchior, P.55; Menanteau, F.19,20; Miquel, R.12,56; Nord, B.23; O'Neill, C. R.14,15; Plazas, A. A.44; Romer, A. K.57; Sako, M.4; Sanchez, E.5; Santiago, B.16,58; Scarpine, V.23; Schindler, R.3; Schubnell, M.46; Smith, M.22; Smith, R. C.35; Soares-Santos, M.23; Sobreira, F.16,59; Suchyta, E.60; Swanson, M. E. C.20; Tarle, G.46; Thomas, D.30; Tucker, D. L.23; Vikram, V.53; Walker, A. R.35; Weller, J.1,34,61; Wester, W.23; Wolf, R. C.4; Yanny, B.23; Zuntz, J.62

We describe the derivation and validation of redshift distribution estimates and their uncertainties for the populations of galaxies used as weak-lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. The Bayesian Photometric Redshift (BPZ) code is used to assign galaxies to four redshift bins between z approximate to 0.2 and approximate to 1.3, and to produce initial estimates of the lensing-weighted redshift distributions n(PZ)(i)(z) proportional to d(n)(i)/dz for members of bin i. Accurate determination of cosmological parameters depends critically on knowledge of n(i), but is insensitive to bin assignments or redshift errors for individual galaxies. The cosmological analyses allow for shifts n(i)(z) = n(PZ)(i)(z - Delta z(i)) to correct the mean redshift of n(i)(z) for biases in n(PZ)(i). The Delta z(i) are constrained by comparison of independently estimated 30-band photometric redshifts of galaxies in the Cosmic Evolution Survey (COSMOS) field to BPZ estimates made from the DES griz fluxes, for a sample matched in fluxes, pre-seeing size, and lensing weight to the DES weak-lensing sources. In companion papers, the Delta z(i) of the three lowest redshift bins are further constrained by the angular clustering of the source galaxies around red galaxies with secure photometric redshifts at 0.15 < z < 0.9. This paper details the BPZ and COSMOS procedures, and demonstrates that the cosmological inference is insensitive to details of the n(i)(z) beyond the choice of Delta z(i). The clustering and COSMOS validation methods produce consistent estimates of Delta z(i) in the bins where both can be applied, with combined uncertainties of sigma(i)(Delta z) = 0.015, 0.013, 0.011, and 0.022 in the four bins. Repeating the photo-z procedure instead using the Directional Neighbourhood Fitting algorithm, or using the n(i)(z) estimated from the matched sample in COSMOS, yields no discernible difference in cosmological inferences.

Keywordmethods: data analysis catalogues surveys
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000439501300044
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Document Type期刊论文
Corresponding AuthorHoyle, B.
Affiliation1.Ludwig Maximilians Univ Munchen, Fak Phys, Univ Sternwarte, Scheinerstr 1, D-81679 Munich, Germany
2.Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
3.SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
4.Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
5.CIEMAT, Madrid, Spain
6.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
7.Swiss Fed Inst Technol, Dept Phys, Wolfgang Pauli Str 16, CH-8093 Zurich, Switzerland
8.IEEC CSIC, Inst Space Sci, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain
9.Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA
10.Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
11.Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA
12.Barcelona Inst Sci & Technol, IFAE, Campus UAB, E-08193 Bellaterra, Barcelona, Spain
13.Brookhaven Natl Lab, Bldg 510, Upton, NY 11973 USA
14.Univ Syndey, ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia
15.Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
16.Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
17.Observ Nacl, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
18.INAF Osservatorio Astrofis Torino, Pino Torinese, Italy
19.Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA
20.Natl Ctr Supercomp Applicat, 1205 West Clark St, Urbana, IL 61801 USA
21.Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
22.Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
23.Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
24.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
25.Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
26.Australian Astron Observ, N Ryde, NSW 2113, Australia
27.Univ Sydney, Sydney Inst Astron, Sch Phys, A28, Sydney, NSW 2006, Australia
28.Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA
29.Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2601, Australia
30.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
31.Univ Manchester, Sch Phys & Astron, Jodrell Bank, Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England
32.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
33.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
34.Max Planck Inst Extraterr Phys, Giessenbachstr, D-85748 Garching, Germany
35.Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
36.Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa
37.LSST, 933 North Cherry Ave, Tucson, AZ 85721 USA
38.Inst Astrophys Paris, CNRS, UMR 7095, F-75014 Paris, France
39.UPMC Univ Paris 06, Sorbonne Univ, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France
40.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
41.Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
42.IIT Hyderabad, Dept Phys, Kandi 502285, Telangana, India
43.CALTECH, Dept Phys, Pasadena, CA 91125 USA
44.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
45.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
46.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
47.Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, E-28049 Madrid, Spain
48.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
49.Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
50.Univ Calif Berkeley, Dept Astron, 501 Campbell Hall, Berkeley, CA 94720 USA
51.Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA
52.Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
53.Argonne Natl Lab, 9700 South Cass Ave, Lemont, IL 60439 USA
54.Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66318, BR-05314970 Sao Paulo, SP, Brazil
55.Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
56.Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain
57.Univ Sussex, Dept Phys & Astron, Pevensey Bldg, Brighton BN1 9QH, E Sussex, England
58.Univ Fed Rio Grande do Sul, Inst Fis, Caixa Postal 15051, BR-91501970 Porto Alegre, RS, Brazil
59.Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP, Brazil
60.Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA
61.Excellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, Germany
62.Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland
Recommended Citation
GB/T 7714
Hoyle, B.,Gruen, D.,Bernstein, G. M.,et al. Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(1):592-610.
APA Hoyle, B..,Gruen, D..,Bernstein, G. M..,Rau, M. M..,De Vicente, J..,...&Zuntz, J..(2018).Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(1),592-610.
MLA Hoyle, B.,et al."Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.1(2018):592-610.
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