Maciej Bilicki (CAMK) : Density of the Universe from the 2MASS clustering dipol

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!! NOTE SPECIAL TIME AND PLACE !!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TODAY, Monday, May 9, 2011, 12:15pm. KS 410 (Keith Spalding 4rth floor) (Pizza @ $2/slice, $0.75 / soda can) The universal density of non-relativistic matter, Omega_m, is one of the most important cosmological parameters. Although now well constrained from such probes as CMB, Supernovae Ia or galaxy clusters, it is usually measured in combination with other parameters. I will show how to estimate it independently of those analyses, using the clustering dipole of the 2MASS Extended Source Catalog. The first method is to compare the growth of the dipole with theoretical expectations. The second consists in using the optimal window function of the 2MASS catalog. First results give Omega_m=0.20+-0.07.