Abstract
Titolo: Optimizing the extraction of cosmological information from Large Scale Structure analysis in view of the next large spectroscopic surveys. Abstract:This proposal aims to develop innovative methods to fully leverage spectroscopic galaxy redshift surveys, with a strong focus on addressing systematic errors that could significantly bias cosmological measurements. For the first time at the BAO scale, we will explore the combined constraining power of lower- and higher-order correlation functions, which contain complementary information on BAO features and structure formation not fully captured by current analyses. To this end, we propose an end-to-end clustering analysis that includes modeling key observational systematics specific to targeted galaxy surveys, developing mitigation strategies, performing a joint measurement of the two-point and three-point correlation functions up to ~120 Mpc/h, and estimating cosmological parameters. Risultati Attesi: "The main goal of this project are the following: - develop an end-to-end pipeline to encode realistic observational effects into simulated data, to be able to quickly forecast the performance of future instruments like the ESA mission Euclid; - quantify the impact of wrong redshift measurements (e.g. for the Euclid mission) on clustering measurements, developing mitigation strategies to compensate for potential biases; - build a comprehensive framework for the analysis of the 3PCF to be applied on real and simulated data: for this purpose, it will be needed to: - develop accurate models for the isotropic and anisotropic 3PCF - generate a ML-based emulator in order to generate the previous models efficiently and robustly; - include these models in a full MCMC analysis to provided constraints on galaxy biases and cosmological parameters. - perform measurements of the 3PCF on real (e.g. SDSS BOSS) and simulated (e.g. Euclid-like) data, including the estimate of the associated covariance matrix; - obtain the first cosmological constraints from the combination of 2PCF+3PCF, both on real and simulated data, and compare the results with standard approaches available in the literature. If successful, this project will deliver the first cosmological constraints from the full-shape analysis of the 3PCF up to the BAO scale, and deliver innovative models that will be used for current and future surveys to expand current analysis to higher-order correlation functions and maximise the scientific exploitation of future spectroscopic surveys."
Project details
Unibo Team Leader: Michele Ennio Maria Moresco
Unibo involved Department/s:
Dipartimento di Fisica e Astronomia "Augusto Righi"
Coordinator:
ALMA MATER STUDIORUM - Università di Bologna(Italy)
Total Eu Contribution: Euro (EUR) 224.301,00
Total Unibo Contribution: Euro (EUR) 112.203,00
Project Duration in months: 24
Start Date:
28/09/2023
End Date:
28/02/2026
