Searching for the great attractor

Abstract

view Abstract Citations (60) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Searching for the Great Attractor Bertschinger, Edmund ; Juszkiewicz, Roman Abstract We test several scenarios for the growth of cosmic structure against recent observations of large-scale peculiar velocities, the velocity field being represented as (1) a dipole flow; (2) a spherical flow toward a great attractor; and (3) a minimal cylindrical model proposed by Faber and Burstein. We show that if the observationally derived flow models are correct, then all the theoretical scenarios we consider have difficulties. For the standard {OMEGA} = 1 biased cold dark matter (CDM) scenario, we confirm earlier conclusions based on the dipole flow model that the CDM predictions fail by a large margin. A drastic revision of the existing fits to the observational data would be required to save this scenario. The isocurvature baryon models (with {OMEGA} = 0.4) fare much better: they naturally lead to large-scale flows. However, these models have difficulty reproducing the observed velocity gradients. The cylindrical flow model constrains theories less than the spherical Great Attractor model does, illustrating the importance of extending present surveys to greater redshift. Publication: The Astrophysical Journal Pub Date: November 1988 DOI: 10.1086/185312 Bibcode: 1988ApJ...334L..59B Keywords: Astronomical Models; Big Bang Cosmology; Dark Matter; Galactic Clusters; Probability Density Functions; Baryons; Normal Density Functions; Statistical Tests; Velocity Distribution; Astrophysics; COSMOLOGY; GALAXIES: CLUSTERING full text sources ADS |