The Sunyaev-Zeldovich Effect

• The Sunyaev-Zeldovich Effect
• SZ leads to spectral distortion (from Carlstrom etal ARAA 2002)
• Seen in galaxy clusters (from Carlstrom etal ARAA 2002)
• Different physical scale from CMB (from Carlstrom etal ARAA 2002)
• Using the SZ to get distances
  
• SZ measurements
• SZ assumptions and issues
  
• X-rays in clusters: smooth, lumpy, Coma
• Early results were pretty much all over the map
• Recent results, well... still are? (H0=66 +/- 10(ran) +/- 10(sys), from Jones etal MNRAS 357 518 2005)
• Here's why (from Carlstrom etal ARAA 2002)
• But things are getting better: More data, better data (H0=77 +/- 4 +/- 10, from Bonamente etal ApJ 647 25 2006)
• Great probe of structure to high redshift (measure more cosmological parameters: OmegaM, OmegaL, sigma8, w...)