Cosmic History from Supernova Beacons

• expectations: luminosity distance for different acceleration
• results: luminosity distance
  • Reiss et al (2007) results plotted, replotted, and replotted again
  • high-redshift SN Ia events
  SNLS team Hubble diagram (Sullivan et al 2011)
  • Pan-STARRS Hubble diagram (Rest et al 2013)
  • Hubble diagram (Betoule+ 2014)
• Acceleration discovery is prizeworthy

Acceleration in a FLRW Universe

• general considerations:
  • pressure large and negative
  • strong energy condition violated
• a Cosmological Constant?
  • a colorful but checkered past: Einstein (1917), Lemaitre (1931)
  • early High-Z, Supernova Cosmology figures
  • combined data figure
  • recent data: SNLS team Lambda vs matter (Sullivan et al 2011)
    Pan-STARRS Omega_Lambda vs Omega_matter (Rest et al 2013)
    w vs matter (Betoule+ 2014)
• Ignorance parameterized: dark energy
  • limits on dark energy density, evolution
  • analysis including SDSS