motivations for MOND/TeVeS

• C_l's are not independent because is low
  • See e.g. AstroPh:0605135
• cosmic variance for alternative model not known if model not known
• the antipodal anticorrelation is stronger in the full sky
• other facts at the scale of about 1 matter horizon radius:
  • Pioneer anomaly
  • Omega_Lambda / onset of acceleration
  • DM
• so many different strange things at a single scale suggest a single explanation
• MOND is not relativistic, not dynamic, by its nature cannot say what to expect in many situations
• TeVeS - tensor vector scalar theory - Bekenstein et al.
  • go from to
  • MOND -> TeVeS - dynamical and geodesic metrics are no longer the same (in GR they are the same)
  • Action is needed
  • subset of TeVeS are GEA(?) - generalised Einstein ether theories

• DGP (example)
• Birkhoff's Theorem important in all of this.