Cosmological parameters from the joint analysis of Density Split and Second Order Statistics: an Emulator based on the Halo Occupation Distribution
arXiv:2406.05098 · doi:10.1103/PhysRevD.110.083517
Abstract
In this work, we develop a simulation-based model to predict the density split (DSS) and second-order shear and clustering statistics. A simulation-based model has the potential to model highly non-linear scales where current DSS models fail. To build this model, we use the N-body simulation suite from which we measure all necessary statistics and train an emulator based on . In that context, we discuss possible improvements for future emulators to make the measurement less noisy and biased, resulting in more accurate and precise model predictions. Regarding the emulator's accuracy, we find that the most important aspect is the average of the summary statistics over multiple-shot noise realizations of the foreground galaxies. However, these results probably depend on the chosen number density of the foreground galaxies. Regarding the parameter forecast based on preliminary LOWZxUNIONS data, we find that DSS has more constraining power to derive cosmological parameters and that the joint analysis with second-order statistics is particularly useful for extracting parameters of the galaxy-halo connection.
16 pages, 16 Figures, accepted at physical review D
References in corpus (39)
- The cosmological simulation code GADGET-2
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- The Baryon Oscillation Spectroscopic Survey of SDSS-III
- Halo Models of Large Scale Structure
- Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- Analytic model for galaxy and dark matter clustering
- Halo occupation numbers and galaxy bias
- Galaxy Evolution from Halo Occupation Distribution Modeling of DEEP2 and SDSS Galaxy Clustering
- The Skewness of the Aperture Mass Statistic
- KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering
- Parameter inference with estimated covariance matrices
- KiDS+GAMA: Cosmology constraints from a joint analysis of cosmic shear, galaxy-galaxy lensing and angular clustering
- AbacusSummit: A Massive Set of High-Accuracy, High-Resolution -Body Simulations
- The BACCO Simulation Project: Exploiting the full power of large-scale structure for cosmology
- COSMOPOWER: emulating cosmological power spectra for accelerated Bayesian inference from next-generation surveys
- Euclid preparation: IX. EuclidEmulator2 -- Power spectrum emulation with massive neutrinos and self-consistent dark energy perturbations
- Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments
- KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics - II: Inference from Shear Peaks using N-body Simulations
- The Cosmological -body Code
- Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS data
- Full-shape cosmology analysis of SDSS-III BOSS galaxy power spectrum using emulator-based halo model: a determination of
- A High-Fidelity Realization of the Euclid Code Comparison -body Simulation with Abacus
- Density split statistics: joint model of counts and lensing in cells
- AbacusHOD: A highly efficient extended multi-tracer HOD framework and its application to BOSS and eBOSS data
- \textsc{CompaSO}: A new halo finder for competitive assignment to spherical overdensities
- Cosmic Shear Cosmology Beyond 2-Point Statistics: A Combined Peak Count and Correlation Function Analysis of DES-Y1
- Cosmological Simulations for Combined-Probe Analyses: Covariance and Neighbour-Exclusion Bias
- Euclid Preparation. XXVIII. Forecasts for ten different higher-order weak lensing statistics
- Persistent homology in cosmic shear: constraining parameters with topological data analysis
- Exploring the squeezed three-point galaxy correlation function with generalized halo occupation distribution models
- The integrated 3-point correlation function of cosmic shear
- Persistent homology in cosmic shear II: A tomographic analysis of DES-Y1
- Capse.jl: efficient and auto-differentiable CMB power spectra emulation
- KiDS-1000 cosmology: Combined second- and third-order shear statistics
- ShapePipe: a new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data
- KiDS-1000 Cosmology: Constraints from density split statistics
- A revised density split statistic model for general filters
- Complementary Cosmological Simulations