Date: May 07 2021
Place: VIRTUAL (please contact organizers to have acces)
PROGRAM
10:00: Cecilia Sccanapieco (DF-UBA)
Title: Simulations of galaxy formation and evolution in a cosmological context
Abstract: During the last three decades simulations of the formation of galaxies in the context of the standard cosmological paradigm have made fantastic progress, overcoming problems such as the angular momentum catastrophe and producing galaxies that resemble disk-bulge systems similar to those observed. In this talk, I will discuss such progress focusing on the formation and evolution of disks in galaxies similar to our Milky Way, and on the relevance of feedback processes on the determination of galaxy properties.
I will also present the results of simulations that use constrained initial conditions
of the Local Group, and discuss environmental effects that might play a role in the formation and evolution of our Galaxy.
11:00: Leonardo Trombetta (CEICO)
Title: From dark energy to black holes in modified gravity theories
Abstract: The accelerated expansion of the Universe could be given by a dynamical scalar degree of freedom. Considering an Effective Field Theory approach for its description, the richest phenomenology comes from the effects of higher-derivative operators. However, these have been already tightly constrained at cosmological scales by observations such as the measurement of the speed of gravitational waves. Nevertheless, the possibility remains that these operators have an observable impact on black-hole physics. This could open a window to learn more about the dark energy field by the study of black-hole merger events.
12:00: MartĂn Crocce (ICE-CSIC)
Title: Cosmology from Large Scale Structure: 3 years of the Dark Energy Survey
Abstract: I will present an overview of current effort to use the distribution of galaxies over large-scales to understand some key open issues in cosmology, such as the accelerated expansion or dark energy problem. I will focus on the ongoing analysis of the first 3 years of observations of the Dark Energy Survey (DES) and summarise its findings combining galaxy clustering and weak gravitational lensing, as well as geometric probes such as baryon acoustic oscillation.