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SDSS Cluster Abundances. Cluster Collaborators Steve Kent Rita Kim Tim Mcay Erin Sheldon Bob Nichol Chris Miller Tomo Goto Neta Bahcall Daniel Eisenstein Marc Postman Cosmology Collaborators: Martin Makler Steve Kent Scott Dodelson Josh Friemann Tim Mckay Erin Sheldon.
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SDSS Cluster Abundances Cluster Collaborators Steve Kent Rita Kim Tim Mcay Erin Sheldon Bob Nichol Chris Miller Tomo Goto Neta Bahcall Daniel Eisenstein Marc Postman Cosmology Collaborators: Martin Makler Steve Kent Scott Dodelson Josh Friemann Tim Mckay Erin Sheldon Constraints on Cosmology James Annis Experimental Astrophysics/ Fermilab
The MaxBCG Cluster Finder The Signal
z = 0.13 z = 0.06 z = 0.20 Likelihood= 1.9 Likelihood= -7.8 Likelihood= -8.4 N=0 N=19 N=0
Cluster Photometric Redshifts Photo-z rms = 0.019 Spectroscopic z
Scaling Mass with N Velocity Dispersion Weak Lensing σ (km/s) N log σ = 0.53 log N + 2.06 log σ = 0.70 log N + 1.75 log M ~ 1.5 log N log M ~ 2.1 log N
σ8 Ωm