Portal de Periódicos da CAPES

The Omega dependence of peculiar velocities induced by spherical density perturbations

1990; Institute of Physics; Volume: 74; Linguagem: Inglês

10.1086/191521

1538-4365

Alan P. Lightman, Paul L. Schechter,

Cosmology and Gravitation Theories

view Abstract Citations (68) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Omega Dependence of Peculiar Velocities Induced by Spherical Density Perturbations Lightman, Alan P. ; Schechter, Paul L. Abstract An attempt is made to clarify the approximate nature of the commonly used Omega exp 0.6 formulas. The velocity of a shell surrounding a spherical density perturbation with average fractional overdensity Delta rho/rho in an otherwise Friedmann universe is expanded here in powers of Delta rho/rho. An expression is obtained for the fractional velocity change of the perturbed shell. Publication: The Astrophysical Journal Supplement Series Pub Date: December 1990 DOI: 10.1086/191521 Bibcode: 1990ApJS...74..831L Keywords: Density Distribution; Red Shift; Space Density; Velocity Distribution; Computational Astrophysics; Perturbation Theory; Astrophysics; COSMOLOGY; GALAXIES: REDSHIFTS full text sources ADS |