Cosmological hydrodynamical simulations of clustering dark energy with Nefertiti
The University of Tokyo(东京大学);Observatoire de Paris, Université PSL, Sorbonne Université, CNRS(巴黎天文台,PSL大学,索邦大学,法国国家科学研究中心);Université Paris-Cité(巴黎西岱大学);Max–Planck–Institut für Astrophysik(马克斯·普朗克天体物理研究所);École Polytechnique(巴黎综合理工学院)
Linda Blot, Théo Gayoux, Fabian Schmidt, Pier Stefano Corasaniti, Bastien de Ligondes
We present the first cosmological simulations that consistently include nonlinear clustering dark energy evolved as a fluid with the numerical hydrodynamics code Nefertiti. Dark energy perturbations become fully nonlinear on small scales, developing significant density fluctuations without exhibiting the catastrophic instabilities previously reported. We show results for the density distribution, power spectrum, and halo profiles of dark energy. Clustering dark energy contributes to the total density perturbation at the $\sim 10\%$ level inside and around massive halos in our simulations with constant $w=-0.9$, a significant potential signal for lensing and dynamical probes. These simulations pave the way to robust constraints on the speed of sound of dark energy perturbations from large-scale structure data.
Predicted number counts and clustering of Hi galaxies from future radio surveys
Jodrell Bank Centre for Astrophysics, University of Manchester(曼彻斯特大学天体物理学中心);Department of Physics and Astronomy, University of Western Cape(西开普大学物理与天文学系)
On the dependence of galaxy assembly bias on the selection criteria, number density, and redshift of galaxy samples
Universidad Complutense de Madrid(马德里康普顿斯大学);Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology(巴塞罗那高等物理研究所(IFAE),巴塞罗那科学技术学院)
Cosmological constraints from the small scale clustering of Emission Line Galaxies
Donostia International Physics Center (DIPC)(圣塞巴斯蒂安国际物理中心);University of the Basque Country UPV/EHU(巴斯克大学);IKERBASQUE, Basque Foundation for Science(伊卡萨巴斯克科学基金会);Institute of Space Sciences (ICE, CSIC)(空间科学研究所(ICE,CSIC));Institute for Computational Cosmology, Department of Physics, Durham University(达勒姆大学物理学院计算宇宙学研究所);Institute of Astronomy, Madingley Road, Cambridge(剑桥大学天文学研究所);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);LadHyX UMR CNRS 7646, École Polytechnique, Institut Polytechnique de Paris(巴黎理工学院高等工业学校拉迪液压实验室);Harvard-Smithsonian Center for Astrophysics(哈佛-史密森尼天体物理中心);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理研究所)
Solving Milky Way-sized Systems with Haskap Pie: A Halo finding Algorithm with efficient Sampling, K-means clustering, tree-Assembly, Particle tracking, Python modules, Inter-code applicability, and Energy solving
The luminosity function and clustering of bright quasars in the FLAMINGO cosmological simulations
Leiden University(莱顿大学);The Australian National University(澳大利亚国立大学);Center for Astrophysics | Harvard & Smithsonian(哈佛-史密森天体物理中心);University of California, Santa Barbara(加州大学圣塔芭芭拉分校);Lorentz Institute for Theoretical Physics, Leiden University(莱顿大学洛伦兹理论物理研究所)
Signatures of Suppressed Matter Clustering revealed by Fast Radio Bursts
California Institute of Technology(加州理工学院);University of Arizona(亚利桑那大学);Owens Valley Radio Observatory, California Institute of Technology(欧文斯谷射电天文台,加州理工学院);Center for Astrophysics | Harvard & Smithsonian(天体物理中心 | 哈佛与史密森尼学会);University of Chicago(芝加哥大学)
Mock catalogues of emission line galaxies based on the local mass density in dark-matter only simulations
发射线星系空间成团的高精度测量是未来宇宙学光谱巡天的主要目标。ELG强辐射的来源是恒星形成星系中大质量短寿命恒星照射周围电离气体产生的星云辐射。因此,ELG更可能驻留在新形成的晕,这导致ELG数密度和物质密度场之间的非线性关系。为了估计宇宙学观测量的协方差矩阵,有必要产生许多独立的实现来模拟大调查体积的ELG分布。为此,我们提出了一种新的和快速的计划,以填充ELG在暗物质只有$N$体模拟的基础上局部密度场。这种方法使模拟ELG目录的快速生产适用于验证分析方法和量化观测系统在即将到来的光谱调查,并可以填充ELG在中等高密度的地区,即使晕结构不能解决由于低分辨率。模拟的ELG的功率谱与流体动力学模拟的结果一致,直到相当小的尺度($\lesssim 1 h \, \mathrm{Mpc}^{-1}$),模拟的ELG更可能被发现在附属结构,这是一致的半解析和流体动力学模拟的结果。此外,我们解决了红移空间功率谱的模拟ELG。测得的多极矩模拟ELG清楚地表现出较弱的上帝之指的效果比那些物质由于下落运动对晕中心,而不是随机的维里运动晕内。
Cosmology with one galaxy: An analytic formula relating $Ω_{\rm m}$ with galaxy properties
New York University(纽约大学);City University of New York(纽约市立大学);Flatiron Institute(平顿研究所);Princeton University(普林斯顿大学);University of California, Berkeley(加州大学伯克利分校);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)
ELG$\times$LRG distribution through dark matter halo dynamics
Universidad de La Laguna(拉古纳大学);Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所);University of Cambridge(剑桥大学);Center for Astrophysics, Harvard & Smithsonian(哈佛-史密森尼天体物理中心);Flatiron Institute(平顿研究所);Durham University(杜伦大学)
KiDS-1000: Improved constraints on cosmology, intrinsic alignments and baryonic feedback from clipped cosmic shear
Institute for Astronomy, University of Edinburgh(爱丁堡大学天体物理研究所);School of Mathematics, Statistics and Physics, Newcastle University(纽卡斯尔大学数学、统计与物理学院);Department of Physics and Astronomy, Astronomy and Plasma Physics (AoP) Division, Chalmers University of Technology(查尔姆斯理工大学天文与等离子体物理系天文学与等离子体物理部);Ruhr University Bochum, Faculty of Physics and Astronomy, Astronomical Institute (AIRUB)(鲁尔大学波鸿分校物理与天文学院天体物理研究所)