Dark energy survey year 1 results: Cross-correlation redshifts in the DES - Calibration of the weak lensing source redshift distributions

DES Collaboration

Dark energy survey year 1 results: Cross-correlation redshifts in the DES - Calibration of the weak lensing source redshift distributions

DES Collaboration

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We present the calibration of the Dark Energy Survey Year 1 (DES Y1) weak lensing source galaxy redshift distributions from clustering measurements. By cross-correlating the positions of source galaxies with luminous red galaxies selected by the redMaGiC algorithm we measure the redshift distributions of the source galaxies as placed into different tomographic bins. These measurements constrain any such shifts to an accuracy of ∼ 0.02 and can be computed even when the clustering measurements do not span the full redshift range. The highest-redshift source bin is not constrained by the clustering measurements because of the minimal redshift overlap with the redMaGiC galaxies. We compare our constraints with those obtained from COSMOS 30-band photometry and find that our two very different methods produce consistent constraints.

Original language	English (US)
Journal	Unknown Journal
State	Published - Oct 6 2017

Keywords

Galaxies: distances and redshifts
Large-scale structure of Universe
Surveys

ASJC Scopus subject areas

General

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@article{7ab9431fe2b94647a05a705e1e3426e4,

title = "Dark energy survey year 1 results: Cross-correlation redshifts in the DES - Calibration of the weak lensing source redshift distributions",

abstract = "We present the calibration of the Dark Energy Survey Year 1 (DES Y1) weak lensing source galaxy redshift distributions from clustering measurements. By cross-correlating the positions of source galaxies with luminous red galaxies selected by the redMaGiC algorithm we measure the redshift distributions of the source galaxies as placed into different tomographic bins. These measurements constrain any such shifts to an accuracy of ∼ 0.02 and can be computed even when the clustering measurements do not span the full redshift range. The highest-redshift source bin is not constrained by the clustering measurements because of the minimal redshift overlap with the redMaGiC galaxies. We compare our constraints with those obtained from COSMOS 30-band photometry and find that our two very different methods produce consistent constraints.",

keywords = "Galaxies: distances and redshifts, Large-scale structure of Universe, Surveys",

author = "{DES Collaboration} and C. Davis and M. Gatti and P. Vielzeuf and R. Cawthon and E. Rozo and A. Alarcon and Bernstein, {G. M.} and C. Bonnett and {Carnero Rosell}, A. and Castander, {F. J.} and C. Chang and {da Costa}, {L. N.} and Davis, {T. M.} and {de Vicente}, J. and J. DeRose and A. Drlica-Wagner and J. Elvin-Poole and E. Gaztanaga and D. Gruen and J. Gschwend and Hartley, {W. G.} and B. Hoyle and H. Lin and Maia, {M. A.G.} and R. Miquel and Ogando, {R. L.C.} and Rau, {M. M.} and A. Roodman and Rykoff, {E. S.} and I. Sevilla-Noarbe and Troxel, {M. A.} and Wechsler, {R. H.} and Abbott, {T. M.C.} and Abdalla, {F. B.} and S. Allam and J. Annis and K. Bechtol and A. Benoit-L{\'e}vy and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and {Carrasco Kind}, M. and J. Carretero and M. Crocce and Cunha, {C. E.} and S. Desai and Diehl, {H. T.} and P. Doel and Eifler, {T. F.} and B. Flaugher",

year = "2017",

month = oct,

day = "6",

language = "English (US)",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

}

TY - JOUR

T1 - Dark energy survey year 1 results

T2 - Cross-correlation redshifts in the DES - Calibration of the weak lensing source redshift distributions

AU - DES Collaboration

AU - Davis, C.

AU - Gatti, M.

AU - Vielzeuf, P.

AU - Cawthon, R.

AU - Rozo, E.

AU - Alarcon, A.

AU - Bernstein, G. M.

AU - Bonnett, C.

AU - Carnero Rosell, A.

AU - Castander, F. J.

AU - Chang, C.

AU - da Costa, L. N.

AU - Davis, T. M.

AU - de Vicente, J.

AU - DeRose, J.

AU - Drlica-Wagner, A.

AU - Elvin-Poole, J.

AU - Gaztanaga, E.

AU - Gruen, D.

AU - Gschwend, J.

AU - Hartley, W. G.

AU - Hoyle, B.

AU - Lin, H.

AU - Maia, M. A.G.

AU - Miquel, R.

AU - Ogando, R. L.C.

AU - Rau, M. M.

AU - Roodman, A.

AU - Rykoff, E. S.

AU - Sevilla-Noarbe, I.

AU - Troxel, M. A.

AU - Wechsler, R. H.

AU - Abbott, T. M.C.

AU - Abdalla, F. B.

AU - Allam, S.

AU - Annis, J.

AU - Bechtol, K.

AU - Benoit-Lévy, A.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - Crocce, M.

AU - Cunha, C. E.

AU - Desai, S.

AU - Diehl, H. T.

AU - Doel, P.

AU - Eifler, T. F.

AU - Flaugher, B.

PY - 2017/10/6

Y1 - 2017/10/6

N2 - We present the calibration of the Dark Energy Survey Year 1 (DES Y1) weak lensing source galaxy redshift distributions from clustering measurements. By cross-correlating the positions of source galaxies with luminous red galaxies selected by the redMaGiC algorithm we measure the redshift distributions of the source galaxies as placed into different tomographic bins. These measurements constrain any such shifts to an accuracy of ∼ 0.02 and can be computed even when the clustering measurements do not span the full redshift range. The highest-redshift source bin is not constrained by the clustering measurements because of the minimal redshift overlap with the redMaGiC galaxies. We compare our constraints with those obtained from COSMOS 30-band photometry and find that our two very different methods produce consistent constraints.

AB - We present the calibration of the Dark Energy Survey Year 1 (DES Y1) weak lensing source galaxy redshift distributions from clustering measurements. By cross-correlating the positions of source galaxies with luminous red galaxies selected by the redMaGiC algorithm we measure the redshift distributions of the source galaxies as placed into different tomographic bins. These measurements constrain any such shifts to an accuracy of ∼ 0.02 and can be computed even when the clustering measurements do not span the full redshift range. The highest-redshift source bin is not constrained by the clustering measurements because of the minimal redshift overlap with the redMaGiC galaxies. We compare our constraints with those obtained from COSMOS 30-band photometry and find that our two very different methods produce consistent constraints.

KW - Galaxies: distances and redshifts

KW - Large-scale structure of Universe

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=85095015873&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85095015873&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85095015873

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -