ICCUB Colloquia

Illuminating the Dark Universe with Supernovae

By Ariel Goobar (The Oskar Klein Centre for Cosmoparticle Physics, Stockholm University)   

Thursday 11 Oct , 12:00:00

Place: Aula Magna
E-mail: germani@icc.ub.edu

 
Abstract
Our knowledge of the cosmic composition has changed drastically over the
last two decades. Observations of Type Ia supernovae, accurate
distance indicators in cosmology, were first to show that the
expansion of the Universe is speeding up, contrary to the expectations
from the attractive nature of gravity on ordinary matter. Thus, the current
standard model of cosmology is based on the existence of "dark matter"
and "dark energy". Understanding the nature of the dark universe remains
among the most pressing issues in contemporary physics.

Since the early days of supernova cosmology, technological advances
have allowed us to drastically increase the science reach: the new
generation of optical cameras used to search for supernovae can image
a large fraction of the observable sky in a single night. We are
starting to discover very rare and precious astronomical systems,
e.g., gravitationally lensed supernovae. Furthermore, we can explore
new time scales for transient phenomena, allowing us to chart new
physics territories.

In this talk I will review the recent history and exciting future
of supernova observations in cosmology.