Dark Energy Survey Year 3 Results: Galaxy mock catalogs for BAO analysis
I. Ferrero, M. Crocce, I. Tutusaus, A. Porredon, L. Blot, P. Fosalba, A. Carnero Rosell, S. Avila, A. Izard, J. Elvin-Poole, K. C. Chan, H. Camacho, R. Rosenfel… 展开作者
I. Ferrero, M. Crocce, I. Tutusaus, A. Porredon, L. Blot, P. Fosalba, A. Carnero Rosell, S. Avila, A. Izard, J. Elvin-Poole, K. C. Chan, H. Camacho, R. Rosenfeld, E. Sanchez, P. Tallada-Crespí, J. Carretero, I. Sevilla-Noarbe, E. Gaztanaga, F. Andrade-Oliveira, J. De Vicente, J. Mena-Fernández, A. J. Ross, D. Sanchez Cid, A. Ferté, A. Brandao-Souza, X. Fang, E. Krause, D. Gomes, M. Aguena, S. Allam, J. Annis, E. Bertin, D. Brooks, M. Carrasco Kind, F. J. Castander, R. Cawthon, A. Choi, C. Conselice, M. Costanzi, L. N. da Costa, M. E. S. Pereira, H. T. Diehl, P. Doel, A. Drlica-Wagner, S. Everett, A. E. Evrard, B. Flaugher, J. Frieman, J. García-Bellido, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, B. Hoyle, D. Huterer, D. J. James, K. Kuehn, M. Lima, M. A. G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, R. Morgan, J. Muir, R. L. C. Ogando, A. Palmese, F. Paz-Chinchón, W. J. Percival, A. A. Plazas Malagón, M. Rodriguez-Monroy, V. Scarpine, M. Schubnell, S. Serrano, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, D. L. Tucker, T. N. Varga
The calibration and validation of scientific analysis in simulations is a fundamental tool to ensure unbiased and robust results in observational cosmology. In particular, mock galaxy catalogs are a crucial resource to achieve these goals in the measurement of baryon acoustic oscillation (BAO) in the clustering of galaxies. Here we present a set of 1952 galaxy mock catalogs designed to mimic the Dark Energy Survey (DES) Year 3 BAO sample over its full photometric redshift range $0.6<z_{\rm photo}<1.1$. The mocks are based upon 488 ICE-COLA fast $N$-body simulations of full-sky light cones and were created by populating halos with galaxies, using a hybrid halo occupation distribution - halo abundance matching model. This model has ten free parameters, which were determined, for the first time, using an automatic likelihood minimization procedure. We also introduced a novel technique to assign photometric redshift for simulated galaxies, following a two-dimensional probability distribution with VIMOS Public Extragalactic Redshift Survey (VIPERS) data. The calibration was designed to match the observed abundance of galaxies as a function of photometric redshift, the distribution of photometric redshift errors, and the clustering amplitude on scales smaller than those used for BAO measurements. An exhaustive analysis was done to ensure that the mocks reproduce the input properties. Finally, mocks were tested by comparing the angular correlation function $w(θ)$, angular power spectrum $C_\ell$, and projected clustering $ξ_p(r_\perp)$ to theoretical predictions and data. The impact of volume replication in the estimate of the covariance is also investigated. The success in accurately reproducing the photometric redshift uncertainties and the galaxy clustering as a function of redshift render this mock creation pipeline as a benchmark for future analyses of photometric galaxy surveys.
Fast and accurate Gaia-unWISE quasar mock catalogs from LPT and Eulerian bias
Université de Genève(日内瓦大学);Universität Zürich(苏黎世大学);Instituto de Astrofísica de Canarias(加那利天体物理研究所);Universidad de La Laguna(拉帕鲁尼亚大学);Kavli Institute for Particle Astrophysics and Cosmology, Stanford University(斯坦福大学卡弗里粒子天体物理学与宇宙学研究所);Institute of Astronomy and NAO, Bulgarian Academy of Sciences(保加利亚科学院天文与国家天文台研究所);MTA–CSFK Lendület “Momentum” Large-Scale Structure (LSS) Research Group(匈牙利科学院-哥白尼天文所“动量”大尺度结构研究组)
Smoothing the redshift distributions of random samples for the baryon acoustic oscillations : applications to the SDSS-III BOSS DR12 and QPM mock samples
Towards a self-consistent analysis of the anisotropic galaxy two- and three-point correlation functions on large scales: application to mock galaxy catalogues
Towards precision cosmology with Voids x CMB correlations (I): Roman-Agora mock catalogs and pipeline validation
Instituto de Astrofísica de Canarias(加那利天体物理学研究所);Universidad de La Laguna(拉古纳大学);MTA–CSFK Lendület “Momentum” Large-Scale Structure (LSS) Research Group(马塔-匈牙利科学院技术研究中心“动量”大尺度结构研究组);Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences(孔科利天文台,匈牙利研究与创新地球与天文学研究中心);CPPM, Aix-Marseille Université, CNRS/IN2P3(马赛物理中心,艾克斯-马赛大学,法国国家科学研究中心/法国国家核与粒子物理研究所);Princeton University(普林斯顿大学)
A halo model approach for mock catalogs of time-variable strong gravitational lenses
Chiba University(千叶大学);Stony Brook University(石溪大学);Stanford University(斯坦福大学);SLAC National Accelerator Laboratory(SLAC国家加速器实验室);Stockholm University(斯德哥尔摩大学);The Inter-University Centre for Astronomy and Astrophysics(大学间天文学与天体物理中心);Kavli Institute for the Physics and Mathematics of the Universe (WPI)(宇宙物理学与数学卡弗里研究所(WPI))
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogues and Measurement of the isotropic BAO between redshift 0.6 and 1.1 for the Emission Line Galaxy Sample
Measuring Baryon Acoustic Oscillations from the clustering of voids
我们调查必要的方法来最佳测量的重子声学振荡(BAO)信号,从星系红移目录的基础上的空隙。为此,我们研究的依赖性的BAO信号的人口的空隙按其大小分类。我们第一次发现的关联函数的空洞,包括第一个强大的检测模拟星系目录中的BAO的特性。这些示出了在对应于样品中的空隙的最小尺寸的尺度周围的反相关性(空隙排除效应),以及在BAO峰的两侧的下降,其可以用于确定BAO信号的显著性而无需任何先验模型。此外,我们的分析表明,有一个规模依赖于偏见的不同人口的空隙取决于半径,具有特殊的属性,即具有最大的BAO意义的空隙人口对应于示踪剂的最大规模上的偏差约为零。我们进一步研究的方法上的一个额外的一套1,000现实模拟星系目录复制SDSS-III/BOSS CMASS DR 11数据,以控制天空遮罩和径向选择功能的影响。我们的解决方案是基于从随机生成的空洞,包括相同的测量几何形状和完整性,以及在孔和测量边界处的后处理清洁程序。在这项工作中验证的空隙人口的方法和最佳选择已被用来执行第一个BAO检测从观察中的空隙,在配套文件。
The DEEP2 Galaxy Redshift Survey: The Voronoi-Delaunay Method catalog of galaxy groups
我们提出了一个公开的星系群的目录构建的光谱样本的星系在第四次数据发布的DEEP 2星系红移调查,包括扩展的Groth带(EGS)。该星表包含1165个在EGS中有两个或更多成员的星群,其红移范围为0<z <1.5 and 1295 groups at z>0.6,在DEEP 2的其余部分。25%的EGS星系和14%的高z DEEP 2星系被分配到星系群。这些基团是使用Voronoi-Delaunay方法检测的,在此之后,它已经按照与Gerke等人(2005)中采用的方法类似的方法在模拟DEEP 2目录上进行了优化。在优化工作中,我们特别注意确保mock目录尽可能接近数据,并且我们已经分别在为EGS和DEEP 2的其余部分构建的mock上对我们的方法进行了微调。我们还探索了假设的宇宙学对我们推断的组发现效率的影响,通过对具有不同背景宇宙学的三个不同的模拟目录进行优化,发现这些不同模拟的组发现成功率存在很大差异。使用模拟目录的背景宇宙学是最符合当前的数据,我们估计,DEEP 2集团目录是72%的完整性和61%的纯度(74%和67%的EGS)和组发现者正确分类70%的星系,真正属于集团,与另外46%的闯入者星系污染的目录(66%和43%的EGS)。(节录)
Estimating the power spectrum covariance matrix with fewer mock samples
星系巡天测量功率谱(P(k))的协方差矩阵在理论上很难计算。目前的最佳实践是通过计算大量模拟目录的样本协方差来估计协方差矩阵。下一代星系巡天将需要数千个大体积模型来确定协方差矩阵,以达到所需的精度。逆协方差矩阵中的误差更大,并且随着P(k)箱的数量而缩放,使得问题更加尖锐。我们开发了一种估计协方差矩阵的方法,使用理论上合理的,少参数模型,校准与模拟目录。使用一组600个BOSS DR 11模拟星表,我们证明了一个七参数模型足以拟合BOSS DR 11 P(k)测量的协方差矩阵。使用此方法计算的协方差优于任何模拟数量的样本协方差,并且仅需要~100个模拟就可以完全收敛,并且逆协方差矩阵以相同的速率收敛。这种方法应该同样适用于下一代星系调查,尽管对更高精度的需求可能需要在拟合函数中添加额外的参数。
High-redshift transverse BAO measurements with the SDSS quasar catalog
Observatório Nacional(国家天文台);University of Trento(特伦托大学);Trento Institute for Fundamental Physics and Applications (TIFPA)-INFN(特伦托基础物理与应用研究所(TIFPA)-意大利国家核物理研究所);Universidade Federal do Rio Grande do Sul(南里奥格兰德联邦大学);Instituto Nacional de Pesquisas Espaciais(巴西国家空间研究院)
Towards precision cosmology with Void x CMB correlations (II): Impact of mock catalogs on the Void x CMB lensing signal
Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所);Universidad de La Laguna(拉戈纳大学);MTA–CSFK Lendület “Momentum” Large-Scale Structure (LSS) Research Group(匈牙利科学院-塞格德大学“动量”大尺度结构研究组);Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences(孔科利天文台,匈牙利研究与创新网络地球与天文学研究中心);CPPM, Aix-Marseille Université, CNRS/IN2P3(地中海粒子与核物理中心,艾克斯-马赛大学,法国国家科学研究中心/法国国家核与粒子物理研究所);Princeton University(普林斯顿大学);California Institute of Technology(加州理工学院)
研究通过分析模拟目录对Void x CMB引力透镜信号的影响,探讨了未来宇宙学约束的潜力,发现该信号对模拟目录的依赖性较低,预计罗马任务结合现有和未来CMB观测将显著提高信号噪声比。