Effects of Distance Uncertainties on Determinations of the Galaxy Peculiar Velocity Field

NELSON PADILLA; MANUEL MERCHÁN; DIEGO G. LAMBAS

ASTROPHYSICAL JOURNAL

Año: 1998 p. 612 - 621

0004-637X

Our statistical studies comprise the mean relative velocity and velocity correlation for pairs of galaxies as a function of separation, and a bulk flow analysis determined on spheres of $10 h^{-1}$ $Mpc$ radius. In order to test the statistical analysis we use COBE normalized CDM numerical simulations with different density parameters and cosmological constant and take into account the Tully-Fisher (TF) scatter and a possible TF zero-point offset, as well as variations in the results of the simulations arising from different observer positions. We compare the results of the mock catalogs with samples of spiral galaxies taken from the Mark III catalog.