IPMU Colloquium (ACP)

Speaker: Brian Schmidt (Nobel Laureate in Physics in 2011) (Australian National University)
Title: Supernovae, the Accelerating Cosmos, and Dark Energy
Date (JST): Tue, Nov 20, 2012, 15:30 - 17:00
Place: Lecture Hall
Abstract: Type Ia supernovae remain one of Astronomy's most precise tools for measuring distances in the Universe. I will describe the cosmological application of these stellar explosions, and chronicle how they were used to discover an accelerating Universe in 1998 - an observation which is most simply explained if more than 70% of the Universe is made up of some previously undetected form of 'Dark Energy'. Over the intervening 13 years, a variety of experiments have been completed, and even more proposed to better constrain the source of the acceleration. I will review the range of experiments, describing the current state of our understanding of the observed acceleration, and speculate about future progress in understanding Dark Energy.