Line of research overview

Cross-Correlation of Cosmic Fields

Principal Investigator: Carlo Baccigalupi

Abstract: Probing the cross-correlation between tracers of the Large Scale Structure (LSS) and Early Universe (EU) is one the most important front for assessing the robustness of the Lambda Cold Dark Matter Cosmology, in particular for what concerns the process of Galaxy Formation and Evolution, the physical properties of the Dark Energy and Matter. Existing projects, such as the Euclid satellite, the Squared Kilometer Array, the Linear Interferometer Gravitational Observatory (LIGO/VIRGO), the Large Scale Structure Telescope (LSST), the Laser Interferometer Space Antenna (LISA) are either operational or in preparation for this entire decade and beyond; they target Cross-Correlation measurements as most impotant ones. Members of the present proposal have responsibility roles in the preparatory work for these efforts and the subsequent exploitation of the data.This line of research at the IFPU exploits the unique location to gather all interested scientists in order to achieve coordination between various projects, growth of collaborations, production of original investigations, and maximizing the return from the results of ongoing observations.

Status of project and perspectives: The IFPU has hosted research on Cross-Correlation of Cosmic Fields, representing a cross-over for modern astrophysics and cosmology. The knowledge of Stellar Physics, Emitters of Gravitational Waves, Galaxy Formation and evolution, and their interplay with the Dark Matter and the Dark Energy in the Large Scale Structure and Cosmic Microwave Background are aspects which need to be connected and coordinated in order to maximize their impact. Affiliated scientists and visitors and working at the IFPU have been producing an impressive list of publications concerning these aspects, and have organized in particular the annual meeting of the Cosmic Microwave Background cross-correlation Working Group within the Euclid Consortium ( https://indico.sissa.it/event/55/).  The IFPU offers an unique opportunity for scientists working at the different aspects to gather together in a single space, working on specific aspects, as well as overviewing the whole efforts, hosting dedicated meetings, scientific visits, and workshops. Activities are based on brainstormings and meetings on a weekly basis at the IFPU, spending at the institute 1 or 2 days per week, as well as organizing regular seminars at the site. Moreover, visits, dedicated and focussed meetings, and workshops throughout the academic year will be organized. The activities will be constantly mirrored on the IFPU site and will be set in coordination with members from the four founding institutions.