Cosmological Constraint on ${\Omega }_m$ and ${\sigma }_8$ from Cluster Abundances using the $GalWCat19$ Optical-Spectroscopic SDSS Catalog

Mohamed H. Abdullah, Anatoly Klypin, Gillian Wilson

We derive cosmological constraints on the matter density, \om, and the amplitude of fluctuations, \sig, using $GalWCat19$, a catalog of 1800 galaxy clusters we identified…