[2025-01-18] For better promotion of the events, the categories in this system will be adjusted. For details, please refer to the announcement of this system. The link is https://indico-tdli.sjtu.edu.cn/news/1-warm-reminder-on-adjusting-indico-tdli-categories-indico

Seminars

Unresolved Anomalies and Tensions in the Standard Cosmological Model

by Dr Eleonora di Valentino (University of Sheffield, UK)

Asia/Shanghai
TDLI Meeting Room N600 (East Wing of Floor 6, North Building)

TDLI Meeting Room N600 (East Wing of Floor 6, North Building)

Description
Abstract

The standard Lambda Cold Dark Matter cosmological model has been incredibly successful in explaining a wide range of observational data, from the cosmic microwave background radiation to the large-scale structure of the universe. However, recent observations have revealed a number of inconsistencies among the model's key cosmological parameters, which have different levels of statistical significance. These include discrepancies in measurements of the Hubble constant, the S8 tension, and the CMB tension. While some of these inconsistencies could be due to systematic errors, the persistence of such tensions across various probes suggests a potential failure of the canonical LCDM model. I will examine these inconsistencies and discuss possible explanations, including modifications to the standard model, that could potentially alleviate them. However, I will also discuss the limitations of these proposed solutions and note that none of them have successfully resolved the discrepancies. 

Biography

I have a PhD from the University of Rome la Sapienza in Theoretical Physics with a thesis in Cosmology. I then joined the IAP in Paris as a Lagrange fellow and the Planck team to work on the legacy release. I then moved to the University of Manchester in the UK as a postdoc and I joined the DES collaboration. After that I became an Addison-Wheeler fellow at Durham University, and I am now a Royal Society Dorothy Hodgkin Research Fellow at the University of Sheffield with a project to work on the cosmological tensions.

Chair
Luca Visinelli
Division
Astronomy and Astrophysics