SIMBAD references

We present an analysis of the ENEAR sample of peculiar velocities of field and cluster elliptical galaxies, obtained with D_n-σ distances. We use the velocity correlation function ψ₁(r) to analyze the statistics of the field object's velocities, while the analysis of the cluster data is based on the estimate of their rms peculiar velocity V_rms. The results are compared with predictions from cosmological models using linear theory. The statistics of the model velocity field is parameterized by the amplitude η₈=σ₈Ω^0.6_m and by the shape parameter Γ of the cold dark matter-like power spectrum. This analysis is performed in redshift space, so as to circumvent the need to address corrections due to inhomogeneous Malmquist bias and to the redshift cutoff adopted in the sample selection. From the velocity correlation statistics, we obtain η₈=0.51^+0.24_–0.09 for Γ=0.25 at the 2 σ level for one interesting fitting parameter. This result agrees with that obtained from a similar analysis of the SFI I-band Tully-Fisher (TF) survey of field Sc galaxies. Even though less constraining, a consistent result is obtained by comparing the measured V_rms of clusters with linear theory predictions. For Γ=0.25, we find η₈=0.63^+0.22_–0.19 at 1 σ. Again, this result agrees, within the uncertainties, with that obtained from the SCI cluster sample based on TF distances. Overall, our results point toward a statistical concordance of the cosmic flows traced by spiral and early-type galaxies, with galaxy distances estimated using TF and D_n-σ distance indicators, respectively.