Photometric redshifts for weak lensing tomography from space: the role of optical and near infrared photometry

被引:68
作者
Abdalla, F. B. [1 ]
Amara, A. [2 ]
Capak, P. [3 ]
Cypriano, E. S. [1 ]
Lahav, O. [1 ]
Rhodes, J. [3 ,4 ]
机构
[1] UCL, Dept Phys & Astron, London WC1E 6BT, England
[2] CEA Saclay, Serv Astrophys, F-91191 Gif sur Yvette, France
[3] CALTECH, Pasadena, CA 91125 USA
[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
关键词
methods : statistical; galaxies : distances and redshifts; cosmology : observations;
D O I
10.1111/j.1365-2966.2008.13151.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study in detail the photometric redshift requirements needed for tomographic weak gravitational lensing in order to measure accurately the dark energy equation of state. In particular, we examine how ground-based photometry (u, g, r, i, z, y) can be complemented by space-based near-infrared (near-IR) photometry (J, H), e.g. onboard the planned DUNE satellite. Using realistic photometric redshift simulations and an artificial neural network photo-z method we evaluate the figure of merit for the dark energy parameters (w(0), w(a)). We consider a DUNE-like broad optical filter supplemented with ground-based multiband optical data from surveys like the Dark Energy Survey, Pan-STARRS and LSST. We show that the dark energy figure of merit would be improved by a factor of 1.3-1.7 if IR filters are added onboard DUNE. Furthermore we show that with IR data catastrophic photo-z outliers can be removed effectively. There is an interplay between the choice of filters, the magnitude limits and the removal of outliers. We draw attention to the dependence of the results on the galaxy formation scenarios encoded into the mock galaxies, e.g. the galaxy reddening. For example, very deep u-band data could be as effective as the IR. We also find that about 10(5)-10(6) spectroscopic redshifts are needed for calibration of the full survey.
引用
收藏
页码:969 / 986
页数:18
相关论文
共 38 条
  • [21] Systematic errors in future weak-lensing surveys: requirements and prospects for self-calibration
    Huterer, D
    Takada, M
    Bernstein, G
    Jain, B
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 366 (01) : 101 - 114
  • [22] Colour tomography
    Jain, Bhuvnesh
    Connolly, Andrew
    Takada, Masahiro
    [J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2007, (03):
  • [23] Suppressing the contribution of intrinsic galaxy alignments to the shear two-point correlation function
    King, L
    Schneider, P
    [J]. ASTRONOMY & ASTROPHYSICS, 2002, 396 (02) : 411 - 418
  • [24] Separating cosmic shear from intrinsic galaxy alignments: Correlation function tomography
    King, LJ
    Schneider, P
    [J]. ASTRONOMY & ASTROPHYSICS, 2003, 398 (01) : 23 - 30
  • [25] Template ultraviolet to near-infrared spectra of star-forming galaxies and their application to K-corrections
    Kinney, AL
    Calzetti, D
    Bohlin, RC
    McQuade, K
    StorchiBergmann, T
    Schmitt, HR
    [J]. ASTROPHYSICAL JOURNAL, 1996, 467 (01) : 38 - 60
  • [26] The VIMOS VLT deep survey -: First epoch VVDS-deep survey:: 11564 spectra with 17.5≤IAB≤24, and the redshift distribution over 0≤z≤5
    Le Fèvre, O
    Vettolani, G
    Garilli, B
    Tresse, L
    Bottini, D
    Le Brun, V
    Maccagni, D
    Picat, JP
    Scaramella, R
    Scodeggio, M
    Zanichelli, A
    Adami, C
    Arnaboldi, M
    Arnouts, S
    Bardelli, S
    Bolzonella, M
    Cappi, A
    Charlot, S
    Ciliegi, P
    Contini, T
    Foucaud, S
    Franzetti, P
    Gavignaud, I
    Guzzo, L
    Ilbert, O
    Iovino, A
    McCracken, HJ
    Marano, B
    Marinoni, C
    Mathez, G
    Mazure, A
    Meneux, B
    Merighi, R
    Paltani, S
    Pellò, R
    Pollo, A
    Pozzetti, L
    Radovich, M
    Zamorani, G
    Zucca, E
    Bondi, M
    Bongiorno, A
    Busarello, G
    Lamareille, F
    Mellier, Y
    Merluzzi, P
    Ripepi, V
    Rizzo, D
    [J]. ASTRONOMY & ASTROPHYSICS, 2005, 439 (03) : 845 - 862
  • [27] LILLY O, 2007, APJS, V172, P70
  • [28] Effects of photometric redshift uncertainties on weak-lensing tomography
    Ma, ZM
    Hu, W
    Huterer, D
    [J]. ASTROPHYSICAL JOURNAL, 2006, 636 (01) : 21 - 29
  • [29] RADIATIVE-TRANSFER IN A CLUMPY UNIVERSE - THE COLORS OF HIGH-REDSHIFT GALAXIES
    MADAU, P
    [J]. ASTROPHYSICAL JOURNAL, 1995, 441 (01) : 18 - 27
  • [30] COSMOS:: Three-dimensional weak lensing and the growth of structure
    Massey, Richard
    Rhodes, Jason
    Leauthaud, Alexie
    Capak, Peter
    Ellis, Richard
    Koekemoer, Anton
    Refregier, Alexandre
    Scoville, Nick
    Taylor, James E.
    Albert, Justin
    Berge, Joel
    Heymans, Catherine
    Johnston, David
    Kneib, Jean-Paul
    Mellier, Yannick
    Mobasher, Bahram
    Semboloni, Elisabetta
    Shopbell, Patrick
    Tasca, Lidia
    Van Waerbeke, Ludovic
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2007, 172 (01) : 239 - 253