Abstract
view Abstract Citations (37) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Linear Perturbation Theory and Spherical Overdensities in Lambda not = 0 Friedmann Models Martel, Hugo Abstract This paper presents various analytical results concerning the properties of large-scale structures in Friedmann models with a positive cosmological constant A. It shows, using linear perturbation theory, that for given density contrast δ and density parameter {OMEGA} the effect of A on the peculiar velocity field is at the most of order a few percent. It also shows that the number counts of galaxies inside the zero-velocity surface of spherical perturbations are nearly independent of A. These results support the conclusion of two previous papers, that the cosmological constant A leaves little observable signature in the current dynamical state of the largescale structure of the universe. Publication: The Astrophysical Journal Pub Date: August 1991 DOI: 10.1086/170331 Bibcode: 1991ApJ...377....7M Keywords: Cosmology; Hubble Constant; Perturbation Theory; Spheres; Galactic Clusters; Radial Velocity; Red Shift; Astrophysics; COSMOLOGY full text sources ADS |
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