The History of Cosmic Expansion: Expectations

• the Universe vs a pop fly
• important cases:
  • empty universe
  • universe with low matter density
  • universe with high matter density

Supernovae and Cosmology

• thumbnail sketch of supernovae
  taxonomy:
  • Type II, Ib/c: obseravation--SN 1987A; theory--core collapse
  • Type Ia: observation--SN 1994D, SN 2014J in M82; SNIa light curve movie
    theory: thermonuclear disruption of white dwarf--simulation
    
• SN Ia digital discovery via subtraction, e.g., here, here
• Supernova cosmology campaigns
  • Supernova Cosmology Project
  • High-z Supernova Search
• Type Ia SNe as Standardizable Candles
  • Examples: low-z SN 1994D, typical medium-z event, z=1.7 discovery in the Hubble Deep Field
  • light curves
  • raw and cooked light curves

Supernovae and Cosmic Expansion History Observed

• Type Ia supernovae as standard candles
  • Search Teams: Supernova Cosmology Project, High-z Supernova Search
  • Examples: low-z SN 1994D, typical medium-z event, z=1.7 discovery in the Hubble Deep Field
  • light curves
• probing cosmic expansion history using supernovae as standard candles
• Bizarre results:
  • less technical presentation here
  • more technically: here and here; and their implications: High-z figure
• Acceleration discovery is prizeworthy