Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
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DOI：
10.1103/physrevd.105.023515
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发表时间：
2021-05
影响因子：
5
通讯作者：
L. Secco;S. Samuroff;E. Krause;B. Jain;J. Blazek;M. Raveri;A. Campos;A. Amon;A. Chen;C. Doux;A. Choi;D. Gruen;G. Bernstein;C. Chang;J. DeRose;J. Myles;A. Fert'e;P. Lemos;D. Huterer;J. Prat;M. Troxel;N. MacCrann;A. Liddle;T. Kacprzak;X. Fang;C. S'anchez;S. Pandey;S. Dodelson;P. Chintalapati;K. Hoffmann;A. Alarcon;O. Alves;F. Andrade-Oliveira;E. Baxter;K. Bechtol;M. Becker;A. Brandao-Souza;H. Camacho;A. Rosell;M. Kind;R. Cawthon;J. Cordero;M. Crocce;C. Davis;E. D. Valentino;A. Drlica-Wagner;K. Eckert;T. Eifler;M. Elidaiana;F. Elsner;J. Elvin-Poole;S. Everett;P. Fosalba;O. Friedrich;M. Gatti;G. Giannini;R. Gruendl;I. Harrison;W. Hartley;K. Herner;H. Huang;E. Huff;M. Jarvis;N. Jeffrey;N. Kuropatkin;P. Léget;J. Muir;J. Mccullough;A. Alsina;Y. Omori;Y. Park;A. Porredon;R. Rollins;A. Roodman;R. Rosenfeld;A. Ross;E. Rykoff;J. Sánchez;I. Sevilla-Noarbe;E. Sheldon;T. Shin;I. Tutusaus;T. Varga;N. Weaverdyck;R. Wechsler;B. Yanny;Biao Yin;Y. Zhang;J. Zuntz;T. Abbott;M. Aguena;S. Allam;J. Annis;D. Bacon;E. Bertin;S. Bhargava;S. Bridle;D. Brooks;E. Buckley-Geer;D. Burke;J. Carretero;M. Costanzi;L. Costa;J. Vicente;H. Diehl;J. Dietrich;P. Doel;I. Ferrero;B. Flaugher;J. Frieman;J. Garc'ia-Bellido;E. Gaztañaga;D. Gerdes;T. Giannantonio;J. Gschwend;G. Gutiérrez;S. Hinton;D. Hollowood;K. Honscheid;B. Hoyle;D. James;T. Jeltema;K. Kuehn;O. Lahav;M. Lima;H. Lin;M. Maia;J. Marshall;P. Martini;Peter Melchior;F. Menanteau;R. Miquel;J. Mohr;R. Morgan;R. Ogando;A. Palmese;F. Paz-Chinch'on;D. Petravick;A. Pieres;A. P. Malag'on;M. Rodríguez-Monroy;A. Romer;E. Sánchez;V. Scarpine;M. Schubnell;D. Scolnic;S. Serrano;M. Smith;M. Soares-Santos;E. Suchyta;M. Swanson;G. Tarlé;D. Thomas;C. To
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文献类型：
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作者：
L. Secco;S. Samuroff;E. Krause;B. Jain;J. Blazek;M. Raveri;A. Campos;A. Amon;A. Chen;C. Doux;A. Choi;D. Gruen;G. Bernstein;C. Chang;J. DeRose;J. Myles;A. Fert'e;P. Lemos;D. Huterer;J. Prat;M. Troxel;N. MacCrann;A. Liddle;T. Kacprzak;X. Fang;C. S'anchez;S. Pandey;S. Dodelson;P. Chintalapati;K. Hoffmann;A. Alarcon;O. Alves;F. Andrade-Oliveira;E. Baxter;K. Bechtol;M. Becker;A. Brandao-Souza;H. Camacho;A. Rosell;M. Kind;R. Cawthon;J. Cordero;M. Crocce;C. Davis;E. D. Valentino;A. Drlica-Wagner;K. Eckert;T. Eifler;M. Elidaiana;F. Elsner;J. Elvin-Poole;S. Everett;P. Fosalba;O. Friedrich;M. Gatti;G. Giannini;R. Gruendl;I. Harrison;W. Hartley;K. Herner;H. Huang;E. Huff;M. Jarvis;N. Jeffrey;N. Kuropatkin;P. Léget;J. Muir;J. Mccullough;A. Alsina;Y. Omori;Y. Park;A. Porredon;R. Rollins;A. Roodman;R. Rosenfeld;A. Ross;E. Rykoff;J. Sánchez;I. Sevilla-Noarbe;E. Sheldon;T. Shin;I. Tutusaus;T. Varga;N. Weaverdyck;R. Wechsler;B. Yanny;Biao Yin;Y. Zhang;J. Zuntz;T. Abbott;M. Aguena;S. Allam;J. Annis;D. Bacon;E. Bertin;S. Bhargava;S. Bridle;D. Brooks;E. Buckley-Geer;D. Burke;J. Carretero;M. Costanzi;L. Costa;J. Vicente;H. Diehl;J. Dietrich;P. Doel;I. Ferrero;B. Flaugher;J. Frieman;J. Garc'ia-Bellido;E. Gaztañaga;D. Gerdes;T. Giannantonio;J. Gschwend;G. Gutiérrez;S. Hinton;D. Hollowood;K. Honscheid;B. Hoyle;D. James;T. Jeltema;K. Kuehn;O. Lahav;M. Lima;H. Lin;M. Maia;J. Marshall;P. Martini;Peter Melchior;F. Menanteau;R. Miquel;J. Mohr;R. Morgan;R. Ogando;A. Palmese;F. Paz-Chinch'on;D. Petravick;A. Pieres;A. P. Malag'on;M. Rodríguez-Monroy;A. Romer;E. Sánchez;V. Scarpine;M. Schubnell;D. Scolnic;S. Serrano;M. Smith;M. Soares-Santos;E. Suchyta;M. Swanson;G. Tarlé;D. Thomas;C. To
这项工作及其配套论文，Amon等人。(2021)，介绍了暗能量调查(DES)第3年数据中来自1亿多个源星系的宇宙剪切测量和宇宙学约束。我们在$\Lambda$CDM中将透镜振幅参数$S_8\equiv\sigma_8\sqrt{\Omega_\textrm{m}/0.3}$约束在3%水平：$S_8=0.759^{+0.025}_{-0.023}$(68%CL)。当使用为$\lambda$CDM分析优化的角度比例切割时，我们的约束是2%的水平：$S_8=0.772^{+0.018}_{-0.017}$(68%CL)。仅就宇宙剪切而言，在我们目前的统计能力下，我们发现暗能量状态方程参数没有统计上的显著限制。我们盲目地进行分析，并将我们的测量结果与其他两个当代弱透镜实验的约束条件进行比较：基洛度调查(KILDS)和超超优质相机斯巴鲁战略计划(HSC)。此外，我们还量化了我们的数据与来自宇宙微波背景(CMB)的外部约束之间的一致性。我们在$\Lambda$CDM假设下的DES Y3结果被发现与普朗克2018年的统计结果一致，尽管倾向于$S_8$比CMB推断的价值低2.3\sigma$($p$-值0.02)。本文探讨了这些宇宙剪切结果对内禀排列、物质功率谱和重子物理模型的稳健性。此外，我们还探讨了我们的数据对不同复杂性的内在比对模型的统计偏好。利用合成数据对基准宇宙切变模型进行了检验，结果表明，由于理论模型中的不确定性，在S 8倍欧米茄{m}平面内不存在大于0.3的偏差。
This work and its companion paper, Amon et al. (2021), present cosmic shear measurements and cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain the lensing amplitude parameter $S_8\equiv\sigma_8\sqrt{\Omega_\textrm{m}/0.3}$ at the 3% level in $\Lambda$CDM: $S_8=0.759^{+0.025}_{-0.023}$ (68% CL). Our constraint is at the 2% level when using angular scale cuts that are optimized for the $\Lambda$CDM analysis: $S_8=0.772^{+0.018}_{-0.017}$ (68% CL). With cosmic shear alone, we find no statistically significant constraint on the dark energy equation-of-state parameter at our present statistical power. We carry out our analysis blind, and compare our measurement with constraints from two other contemporary weak-lensing experiments: the Kilo-Degree Survey (KiDS) and Hyper-Suprime Camera Subaru Strategic Program (HSC). We additionally quantify the agreement between our data and external constraints from the Cosmic Microwave Background (CMB). Our DES Y3 result under the assumption of $\Lambda$CDM is found to be in statistical agreement with Planck 2018, although favors a lower $S_8$ than the CMB-inferred value by $2.3\sigma$ (a $p$-value of 0.02). This paper explores the robustness of these cosmic shear results to modeling of intrinsic alignments, the matter power spectrum and baryonic physics. We additionally explore the statistical preference of our data for intrinsic alignment models of different complexity. The fiducial cosmic shear model is tested using synthetic data, and we report no biases greater than 0.3$\sigma$ in the plane of $S_8\times\Omega_\textrm{m}$ caused by uncertainties in the theoretical models.