@article{72dfd6ffdd204e6faade125e4bfebcf1, title = "Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing", abstract = "We present cosmological results from a combined analysis of galaxy clustering and weak gravitational lensing, using 1321 deg$^2$ 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 $\Lambda$CDM and $w$CDM cosmologies, marginalizing over 20 nuisance parameters, varying 6 (for $\Lambda$CDM) or 7 (for $w$CDM) cosmological parameters including the neutrino mass density and including the 457 $\times$ 457 element analytic covariance matrix. We find consistent cosmological results from these three two-point functions, and from their combination obtain $S_8 \equiv \sigma_8 (\Omega_m/0.3)^{0.5} = 0.783^{+0.021}_{-0.025}$ and $\Omega_m = 0.264^{+0.032}_{-0.019}$ for $\Lambda$CDM for $w$CDM, we find $S_8 = 0.794^{+0.029}_{-0.027}$, $\Omega_m = 0.279^{+0.043}_{-0.022}$, and $w=-0.80^{+0.20}_{-0.22}$ at 68{\%} CL. The precision of these DES Y1 results 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 $S_8$ and $\Omega_m$ are lower than the central values from Planck ...", keywords = "Astrophysics - Cosmology and Nongalactic Astrophysics", author = "Abbott, {T. M. C.} and Abdalla, {F. B.} and A. Alarcon and J. AleksiÄ‡ 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 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 and Kim, {A. G.} and A. King and D. Kirk and N. Kokron and A. Kovacs and E. Krause and C. Krawiec and A. Kremin and K. Kuehn and S. Kuhlmann and N. Kuropatkin and F. Lacasa and O. Lahav and Li, {T. S.} and Liddle, {A. R.} and C. Lidman and M. Lima and H. Lin and N. MacCrann and Maia, {M. A. G.} and M. Makler and M. Manera and M. March and Marshall, {J. L.} and P. Martini and McMahon, {R. G.} and P. Melchior and F. Menanteau and R. Miquel and V. Miranda and D. Mudd and J. Muir and A. M{\"o}ller and E. Neilsen and Nichol, {R. C.} and B. Nord and P. Nugent and Ogando, {R. L. C.} and A. Palmese and J. Peacock and Peiris, {H. V.} and J. Peoples and Percival, {W. J.} and D. Petravick and Plazas, {A. A.} and A. Porredon and J. Prat and A. Pujol and Rau, {M. M.} and A. Refregier and Ricker, {P. M.} and N. Roe and Rollins, {R. P.} and Romer, {A. K.} and A. Roodman and R. Rosenfeld and Ross, {A. J.} and E. Rozo and Rykoff, {E. S.} and M. Sako and Salvador, {A. I.} and S. Samuroff and C. S{\'a}nchez and E. Sanchez and B. Santiago and V. Scarpine and R. Schindler and D. Scolnic and Secco, {L. F.} and S. Serrano and I. Sevilla-Noarbe and E. Sheldon and Smith, {R. C.} and M. Smith and J. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and G. Tarle and D. Thomas and Troxel, {M. A.} and Tucker, {D. L.} and Tucker, {B. E.} and Uddin, {S. A.} and Varga, {T. N.} and P. Vielzeuf and V. Vikram and Vivas, {A. K.} and Walker, {A. R.} and M. Wang and Wechsler, {R. H.} and J. Weller and W. Wester and Wolf, {R. C.} and B. Yanny and F. Yuan and A. Zenteno and B. Zhang and Y. Zhang and J. Zuntz", year = "2018", month = "8", day = "27", doi = "10.1103/PhysRevD.98.043526", language = "English", journal = "Physical Review D", issn = "2470-0010", publisher = "American Physical Society", }