An estimate of Omega(m) without conventional priors
File(s)Feldman_2003_ApJ_596_L131.pdf (96.55 KB)
Published version
Author(s)
Type
Journal Article
Abstract
Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density
parameter and the amplitude of density fluctuations j8 Qm . Our results suggest that our statistic is a robust and
reproducible measure of the mean pairwise velocity and thereby the parameter. We get and 0.17 Q Q m m p 0.300.07
. These estimates do not depend on prior assumptions on the adiabaticity of the initial density 0.22 j8 p 1.130.23
fluctuations, the ionization history, or the values of other cosmological parameters.
parameter and the amplitude of density fluctuations j8 Qm . Our results suggest that our statistic is a robust and
reproducible measure of the mean pairwise velocity and thereby the parameter. We get and 0.17 Q Q m m p 0.300.07
. These estimates do not depend on prior assumptions on the adiabaticity of the initial density 0.22 j8 p 1.130.23
fluctuations, the ionization history, or the values of other cosmological parameters.
Date Issued
2003-09-29
Date Acceptance
2003-08-25
Citation
Astrophysical Journal, 2003, 596 (2), pp.L131-L134
ISSN
0004-637X
Publisher
American Astronomical Society
Start Page
L131
End Page
L134
Journal / Book Title
Astrophysical Journal
Volume
596
Issue
2
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
ASTRONOMY & ASTROPHYSICS
cosmological parameters
cosmology : observations
cosmology : theory
distance scale
galaxies : distances and redshifts
large-scale structure of universe
PECULIAR VELOCITY ANALYSIS
GALAXY REDSHIFT SURVEY
TULLY-FISHER RELATION
DISTANCE DATA
SC GALAXIES
UNIVERSE
DENSITY
BIAS
CALIBRATION
MOTIONS
Publication Status
Published