Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing

T. M.C. Abbott; F. B. Abdalla; A. Alarcon; J. Aleksić; S. Allam; S. Allen; A. Amara; J. Annis; J. Asorey; S. Avila; D. Bacon; E. Balbinot; M. Banerji; N. Banik; W. Barkhouse; M. Baumer; E. Baxter; K. Bechtol; M. R. Becker; A. Benoit-Lévy; B. A. Benson; G. M. Bernstein; E. Bertin; J. Blazek; S. L. Bridle; D. Brooks; D. Brout; E. Buckley-Geer; D. L. Burke; M. T. Busha; A. Campos; D. Capozzi; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; F. J. Castander; R. Cawthon; C. Chang; N. Chen; M. Childress; A. Choi; C. Conselice; R. Crittenden; M. Crocce; C. E. Cunha; C. B. D'Andrea; L. N. Da Costa; R. Das; T. M. Davis; C. Davis; J. De Vicente; D. L. Depoy; J. Derose; S. Desai; H. T. Diehl; J. P. Dietrich; S. Dodelson; P. Doel; A. Drlica-Wagner; T. F. Eifler; A. E. Elliott; F. Elsner; J. Elvin-Poole; J. Estrada; A. E. Evrard; Y. Fang; E. Fernandez; A. Ferté; D. A. Finley; B. Flaugher; P. Fosalba; O. Friedrich; J. Frieman; J. García-Bellido; M. Garcia-Fernandez; M. Gatti; E. Gaztanaga; D. W. Gerdes; T. Giannantonio; M. S.S. Gill; K. Glazebrook; D. A. Goldstein; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; S. Hamilton; W. G. Hartley; S. R. Hinton; K. Honscheid; B. Hoyle; D. Huterer; B. Jain; D. J. James; M. Jarvis; T. Jeltema; M. D. Johnson; M. W.G. Johnson; T. Kacprzak; S. Kent

doi:10.1103/PhysRevD.98.043526

Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing

T. M.C. Abbott, F. B. Abdalla, A. Alarcon, J. Aleksić, S. Allam, S. Allen, A. Amara, J. Annis, J. Asorey, S. Avila, D. Bacon, E. Balbinot, M. Banerji, N. Banik, W. Barkhouse, M. Baumer, E. Baxter, K. Bechtol, M. R. Becker, A. Benoit-LévyB. A. Benson, G. M. Bernstein, E. Bertin, J. Blazek, S. L. Bridle, D. Brooks, D. Brout, E. Buckley-Geer, D. L. Burke, M. T. Busha, A. Campos, D. Capozzi, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, C. Chang, N. Chen, M. Childress, A. Choi, C. Conselice, R. Crittenden, M. Crocce, C. E. Cunha, C. B. D'Andrea, L. N. Da Costa, R. Das, T. M. Davis, C. Davis, J. De Vicente, D. L. Depoy, J. Derose, S. Desai, H. T. Diehl, J. P. Dietrich, S. Dodelson, P. Doel, A. Drlica-Wagner, T. F. Eifler, A. E. Elliott, F. Elsner, J. Elvin-Poole, J. Estrada, A. E. Evrard, Y. Fang, E. Fernandez, A. Ferté, D. A. Finley, B. Flaugher, P. Fosalba, O. Friedrich, J. Frieman, J. García-Bellido, M. Garcia-Fernandez, M. Gatti, E. Gaztanaga, D. W. Gerdes, T. Giannantonio, M. S.S. Gill, K. Glazebrook, D. A. Goldstein, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. Hamilton, W. G. Hartley, S. R. Hinton, K. Honscheid, B. Hoyle, D. Huterer, B. Jain, D. J. James, M. Jarvis, T. Jeltema, M. D. Johnson, M. W.G. Johnson, T. Kacprzak, S. Kent

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Abstract

© 2018 American Physical Society. We 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 prevent confirmation bias, the bulk of the analysis was carried out while "blind" to the true results; we describe an extensive suite of systematics checks performed and passed during this blinded phase. The data are modeled in flat ΛCDM and wCDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for ΛCDM) or 7 (for wCDM) cosmological parameters including the neutrino mass density and including the 457×457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions and from their combination obtain S8≡σ8(Ωm/0.3)0.5=0.773-0.020+0.026 and Ωm=0.267-0.017+0.030 for ΛCDM; for wCDM, we find S8=0.782-0.024+0.036, Ωm=0.284-0.030+0.033, and w=-0.82-0.20+0.21 at 68% C.L. The precision of these DES Y1 constraints rivals that from the Planck cosmic microwave background measurements, allowing a comparison of structure in the very early and late Universe on equal terms. Although the DES Y1 best-fit values for S8 and Ωm are lower than the central values from Planck for both ΛCDM and wCDM, the Bayes factor indicates that the DES Y1 and Planck data sets are consistent with each other in the context of ΛCDM. Combining DES Y1 with Planck, baryonic acoustic oscillation measurements from SDSS, 6dF, and BOSS and type Ia supernovae from the Joint Lightcurve Analysis data set, we derive very tight constraints on cosmological parameters: S8=0.802±0.012 and Ωm=0.298±0.007 in ΛCDM and w=-1.00-0.04+0.05 in wCDM. Upcoming Dark Energy Survey analyses will provide more stringent tests of the ΛCDM model and extensions such as a time-varying equation of state of dark energy or modified gravity.

Original language	English
Article number	043526
Journal	Physical Review D
Volume	98
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevD.98.043526
Publication status	Published - 15 Aug 2018

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10.1103/PhysRevD.98.043526

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Abbott, T. M. C., Abdalla, F. B., Alarcon, A., Aleksić, J., Allam, S., Allen, S., Amara, A., Annis, J., Asorey, J., Avila, S., Bacon, D., Balbinot, E., Banerji, M., Banik, N., Barkhouse, W., Baumer, M., Baxter, E., Bechtol, K., Becker, M. R., ... Kent, S. (2018). Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing. Physical Review D, 98(4), Article 043526. https://doi.org/10.1103/PhysRevD.98.043526

@article{0cf4163bb270457896a4c4c89c78cc80,

title = "Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing",

abstract = "{\textcopyright} 2018 American Physical Society. We 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 prevent confirmation bias, the bulk of the analysis was carried out while {"}blind{"} to the true results; we describe an extensive suite of systematics checks performed and passed during this blinded phase. The data are modeled in flat ΛCDM and wCDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for ΛCDM) or 7 (for wCDM) cosmological parameters including the neutrino mass density and including the 457×457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions and from their combination obtain S8≡σ8(Ωm/0.3)0.5=0.773-0.020+0.026 and Ωm=0.267-0.017+0.030 for ΛCDM; for wCDM, we find S8=0.782-0.024+0.036, Ωm=0.284-0.030+0.033, and w=-0.82-0.20+0.21 at 68% C.L. The precision of these DES Y1 constraints rivals that from the Planck cosmic microwave background measurements, allowing a comparison of structure in the very early and late Universe on equal terms. Although the DES Y1 best-fit values for S8 and Ωm are lower than the central values from Planck for both ΛCDM and wCDM, the Bayes factor indicates that the DES Y1 and Planck data sets are consistent with each other in the context of ΛCDM. Combining DES Y1 with Planck, baryonic acoustic oscillation measurements from SDSS, 6dF, and BOSS and type Ia supernovae from the Joint Lightcurve Analysis data set, we derive very tight constraints on cosmological parameters: S8=0.802±0.012 and Ωm=0.298±0.007 in ΛCDM and w=-1.00-0.04+0.05 in wCDM. Upcoming Dark Energy Survey analyses will provide more stringent tests of the ΛCDM model and extensions such as a time-varying equation of state of dark energy or modified gravity.",

author = "Abbott, {T. M.C.} and Abdalla, {F. B.} and A. Alarcon and J. Aleksi{\'c} and S. Allam and S. Allen and A. Amara and J. Annis and J. Asorey and S. Avila and D. Bacon and E. Balbinot and M. Banerji and N. Banik and W. Barkhouse and M. Baumer and E. Baxter and K. Bechtol and Becker, {M. R.} and A. Benoit-L{\'e}vy and Benson, {B. A.} and Bernstein, {G. M.} and E. Bertin and J. Blazek and Bridle, {S. L.} and D. Brooks and D. Brout and E. Buckley-Geer and Burke, {D. L.} and Busha, {M. T.} and A. Campos and D. Capozzi and {Carnero Rosell}, A. and {Carrasco Kind}, M. and J. Carretero and Castander, {F. J.} and R. Cawthon and C. Chang and N. Chen and M. Childress and A. Choi and C. Conselice and R. Crittenden and M. Crocce and Cunha, {C. E.} and D'Andrea, {C. B.} and {Da Costa}, {L. N.} and R. Das and Davis, {T. M.} and C. Davis and {De Vicente}, J. and Depoy, {D. L.} and J. Derose and S. Desai and Diehl, {H. T.} and Dietrich, {J. P.} and S. Dodelson and P. Doel and A. Drlica-Wagner and Eifler, {T. F.} and Elliott, {A. E.} and F. Elsner and J. Elvin-Poole and J. Estrada and Evrard, {A. E.} and Y. Fang and E. Fernandez and A. Fert{\'e} and Finley, {D. A.} and B. Flaugher and P. Fosalba and O. Friedrich and J. Frieman and J. Garc{\'i}a-Bellido and M. Garcia-Fernandez and M. Gatti and E. Gaztanaga and Gerdes, {D. W.} and T. Giannantonio and Gill, {M. S.S.} and K. Glazebrook and Goldstein, {D. A.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and S. Hamilton and Hartley, {W. G.} and Hinton, {S. R.} and K. Honscheid and B. Hoyle and D. Huterer and B. Jain and James, {D. J.} and M. Jarvis and T. Jeltema and Johnson, {M. D.} and Johnson, {M. W.G.} and T. Kacprzak and S. Kent",

year = "2018",

month = aug,

day = "15",

doi = "10.1103/PhysRevD.98.043526",

language = "English",

volume = "98",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "4",

}

Abbott, TMC, Abdalla, FB, Alarcon, A, Aleksić, J, Allam, S, Allen, S, Amara, A, Annis, J, Asorey, J, Avila, S, Bacon, D, Balbinot, E, Banerji, M, Banik, N, Barkhouse, W, Baumer, M, Baxter, E, Bechtol, K, Becker, MR, Benoit-Lévy, A, Benson, BA, Bernstein, GM, Bertin, E, Blazek, J, Bridle, SL, Brooks, D, Brout, D, Buckley-Geer, E, Burke, DL, Busha, MT, Campos, A, Capozzi, D, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Castander, FJ, Cawthon, R, Chang, C, Chen, N, Childress, M, Choi, A, Conselice, C, Crittenden, R, Crocce, M, Cunha, CE, D'Andrea, CB, Da Costa, LN, Das, R, Davis, TM, Davis, C, De Vicente, J, Depoy, DL, Derose, J, Desai, S, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Drlica-Wagner, A, Eifler, TF, Elliott, AE, Elsner, F, Elvin-Poole, J, Estrada, J, Evrard, AE, Fang, Y, Fernandez, E, Ferté, A, Finley, DA, Flaugher, B, Fosalba, P, Friedrich, O, Frieman, J, García-Bellido, J, Garcia-Fernandez, M, Gatti, M, Gaztanaga, E, Gerdes, DW, Giannantonio, T, Gill, MSS, Glazebrook, K, Goldstein, DA, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Hamilton, S, Hartley, WG, Hinton, SR, Honscheid, K, Hoyle, B, Huterer, D, Jain, B, James, DJ, Jarvis, M, Jeltema, T, Johnson, MD, Johnson, MWG, Kacprzak, T & Kent, S 2018, 'Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing', Physical Review D, vol. 98, no. 4, 043526. https://doi.org/10.1103/PhysRevD.98.043526

TY - JOUR

T1 - Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing

AU - Abbott, T. M.C.

AU - Abdalla, F. B.

AU - Alarcon, A.

AU - Aleksić, J.

AU - Allam, S.

AU - Allen, S.

AU - Amara, A.

AU - Annis, J.

AU - Asorey, J.

AU - Avila, S.

AU - Bacon, D.

AU - Balbinot, E.

AU - Banerji, M.

AU - Banik, N.

AU - Barkhouse, W.

AU - Baumer, M.

AU - Baxter, E.

AU - Bechtol, K.

AU - Becker, M. R.

AU - Benoit-Lévy, A.

AU - Benson, B. A.

AU - Bernstein, G. M.

AU - Bertin, E.

AU - Blazek, J.

AU - Bridle, S. L.

AU - Brooks, D.

AU - Brout, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Busha, M. T.

AU - Campos, A.

AU - Capozzi, D.

AU - Carnero Rosell, A.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - Castander, F. J.

AU - Cawthon, R.

AU - Chang, C.

AU - Chen, N.

AU - Childress, M.

AU - Choi, A.

AU - Conselice, C.

AU - Crittenden, R.

AU - Crocce, M.

AU - Cunha, C. E.

AU - D'Andrea, C. B.

AU - Da Costa, L. N.

AU - Das, R.

AU - Davis, T. M.

AU - Davis, C.

AU - De Vicente, J.

AU - Depoy, D. L.

AU - Derose, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dietrich, J. P.

AU - Dodelson, S.

AU - Doel, P.

AU - Drlica-Wagner, A.

AU - Eifler, T. F.

AU - Elliott, A. E.

AU - Elsner, F.

AU - Elvin-Poole, J.

AU - Estrada, J.

AU - Evrard, A. E.

AU - Fang, Y.

AU - Fernandez, E.

AU - Ferté, A.

AU - Finley, D. A.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Friedrich, O.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Garcia-Fernandez, M.

AU - Gatti, M.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Giannantonio, T.

AU - Gill, M. S.S.

AU - Glazebrook, K.

AU - Goldstein, D. A.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hamilton, S.

AU - Hartley, W. G.

AU - Hinton, S. R.

AU - Honscheid, K.

AU - Hoyle, B.

AU - Huterer, D.

AU - Jain, B.

AU - James, D. J.

AU - Jarvis, M.

AU - Jeltema, T.

AU - Johnson, M. D.

AU - Johnson, M. W.G.

AU - Kacprzak, T.

AU - Kent, S.

PY - 2018/8/15

Y1 - 2018/8/15

N2 - © 2018 American Physical Society. We 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 prevent confirmation bias, the bulk of the analysis was carried out while "blind" to the true results; we describe an extensive suite of systematics checks performed and passed during this blinded phase. The data are modeled in flat ΛCDM and wCDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for ΛCDM) or 7 (for wCDM) cosmological parameters including the neutrino mass density and including the 457×457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions and from their combination obtain S8≡σ8(Ωm/0.3)0.5=0.773-0.020+0.026 and Ωm=0.267-0.017+0.030 for ΛCDM; for wCDM, we find S8=0.782-0.024+0.036, Ωm=0.284-0.030+0.033, and w=-0.82-0.20+0.21 at 68% C.L. The precision of these DES Y1 constraints rivals that from the Planck cosmic microwave background measurements, allowing a comparison of structure in the very early and late Universe on equal terms. Although the DES Y1 best-fit values for S8 and Ωm are lower than the central values from Planck for both ΛCDM and wCDM, the Bayes factor indicates that the DES Y1 and Planck data sets are consistent with each other in the context of ΛCDM. Combining DES Y1 with Planck, baryonic acoustic oscillation measurements from SDSS, 6dF, and BOSS and type Ia supernovae from the Joint Lightcurve Analysis data set, we derive very tight constraints on cosmological parameters: S8=0.802±0.012 and Ωm=0.298±0.007 in ΛCDM and w=-1.00-0.04+0.05 in wCDM. Upcoming Dark Energy Survey analyses will provide more stringent tests of the ΛCDM model and extensions such as a time-varying equation of state of dark energy or modified gravity.

AB - © 2018 American Physical Society. We 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 prevent confirmation bias, the bulk of the analysis was carried out while "blind" to the true results; we describe an extensive suite of systematics checks performed and passed during this blinded phase. The data are modeled in flat ΛCDM and wCDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for ΛCDM) or 7 (for wCDM) cosmological parameters including the neutrino mass density and including the 457×457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions and from their combination obtain S8≡σ8(Ωm/0.3)0.5=0.773-0.020+0.026 and Ωm=0.267-0.017+0.030 for ΛCDM; for wCDM, we find S8=0.782-0.024+0.036, Ωm=0.284-0.030+0.033, and w=-0.82-0.20+0.21 at 68% C.L. The precision of these DES Y1 constraints rivals that from the Planck cosmic microwave background measurements, allowing a comparison of structure in the very early and late Universe on equal terms. Although the DES Y1 best-fit values for S8 and Ωm are lower than the central values from Planck for both ΛCDM and wCDM, the Bayes factor indicates that the DES Y1 and Planck data sets are consistent with each other in the context of ΛCDM. Combining DES Y1 with Planck, baryonic acoustic oscillation measurements from SDSS, 6dF, and BOSS and type Ia supernovae from the Joint Lightcurve Analysis data set, we derive very tight constraints on cosmological parameters: S8=0.802±0.012 and Ωm=0.298±0.007 in ΛCDM and w=-1.00-0.04+0.05 in wCDM. Upcoming Dark Energy Survey analyses will provide more stringent tests of the ΛCDM model and extensions such as a time-varying equation of state of dark energy or modified gravity.

U2 - 10.1103/PhysRevD.98.043526

DO - 10.1103/PhysRevD.98.043526

M3 - Article

SN - 2470-0010

VL - 98

JO - Physical Review D

JF - Physical Review D

IS - 4

M1 - 043526

ER -

Dark Energy Survey year 1 results: Cosmological constraints from galaxy clustering and weak lensing

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