Supernovae, the Accelerating Cosmos, and Dark Energy
Abstract
Type Ia supernovae remain one of Astronomy's most precise tools for measuring distances in the Universe. I 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 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.
- Publication:
-
Highlights of Astronomy
- Pub Date:
- March 2015
- DOI:
- 10.1017/S174392131400461X
- Bibcode:
- 2015HiA....16...17S