Dark Energy

• Ignorance parameterized
  • from Kessler et al 2009: w vs matter
  • from Hicken et al 2009: density vs w
  • from Kowalski et al 2008: w evolution,
  w vs matter, w₀ vs w_a (Betoule+ 2014)
• Coincidences: cosmic epochs in perspective
• Dark energy as a field

Dark Energy as Phantom Energy

• unhealthy consequences explained and foretold here and here

Cosmic Scalar Fields

• scalar fields in a nutshell
• fundamental(?) scalar fields exist in nature!
• scalar fields in a cosmological context

Dark Energy as Quintessence

• tracker evolution