Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing
- Abbott, T.M.C.
- Abdalla, F.B.
- Alarcon, A.
- Aleksić, J.
- Allam, S.
- Allen, S.
- Amara, A.
- Annis, J.
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- Barkhouse, W.
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- Benoit-Lévy, A.
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- Carrasco Kind, M.
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- Chang, C.
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- Childress, M.
- Choi, A.
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- Crittenden, R.
- Crocce, M.
- Cunha, C.E.
- D'Andrea, C.B.
- Da Costa, L.N.
- Das, R.
- Davis, T.M.
- Davis, C.
- De Vicente, J.
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- DeRose, J.
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- Dietrich, J.P.
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- Friedrich, O.
- Frieman, J.
- García-Bellido, J.
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- Gaztanaga, E.
- Gerdes, D.W.
- Giannantonio, T.
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- Gutierrez, G.
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- Huterer, D.
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- Johnson, M.D.
- Johnson, M.W.G.
- Kacprzak, T.
- Kent, S.
- Kim, A.G.
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- Kovacs, A.
- Krause, E.
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- Neilsen, E.
- Nichol, R.C.
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- Peiris, H.V.
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- Percival, W.J.
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- Rykoff, E.S.
- Sako, M.
- Salvador, A.I.
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- Tucker, B.E.
- Uddin, S.A.
- Varga, T.N.
- Vielzeuf, P.
- Vikram, V.
- Vivas, A.K.
- Walker, A.R.
- Wang, M.
- Wechsler, R.H.
- Weller, J.
- Wester, W.
- Wolf, R.C.
- Yanny, B.
- Yuan, F.
- Zenteno, A.
- Zhang, B.
- Zhang, Y.
- Zuntz, J.
DOIAbstract
International audienceWe present cosmological results from a combined analysis of galaxy clustering and weak gravitational lensing, using 1321 deg2 of griz imaging data from the first year of the Dark Energy Survey (DES Y1). We combine three two-point functions: (i) the cosmic shear correlation function of 26 million source galaxies in four redshift bins, (ii) the galaxy angular autocorrelation function of 650,000 luminous red galaxies in five redshift bins, and (iii) the galaxy-shear cross-correlation of luminous red galaxy positions and source galaxy shears. To demonstrate the robustness of these results, we use independent pairs of galaxy shape, photometric-redshift estimation and validation, and likelihood analysis pipelines. To preven...
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