Surface Brightess Fluctuations

• Method
  
• Method (cont)
• Cartoon
• Reality (from Dunn & Jerjen, AJ, 132, 1384, 2006)
  
• Complication due to metallicity effect
• Globular cluster color-mag diagram showing red giant branch
• Metallicity effects on RGB
• SBF Metallicity effects - model (from Raimondo etal 1996)
• SBF Metallicity effects - observations (from Jensen etal, ApJ, 583, 712, 2003)
  
• Method applied to nearby groups (using apparent magnitude)
• Calibration and early results
• Application to Fornax (Dunn & Jerjen 2006) (d=20.1 +/- 0.3 Mpc, H0=63 +/- 5 km/s/Mpc)
• Fornax Velocity Field (Dunn & Jerjen 2006)