An estimate of Omega(m) without conventional priors

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Title: An estimate of Omega(m) without conventional priors
Authors: Feldman, H
Juszkiewicz, R
Ferreira, P
Davis, M
Gaztanaga, E
Fry, J
Jaffe, A
Chambers, S
Da Costa, L
Bernardi, M
Giovanelli, R
Haynes, M
Wegner, G
Item 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.
Issue Date: 29-Sep-2003
Date of Acceptance: 25-Aug-2003
URI: http://hdl.handle.net/10044/1/47904
DOI: 10.1086/379221
ISSN: 0004-637X
Publisher: American Astronomical Society
Start Page: L131
End Page: L134
Journal / Book Title: Astrophysical Journal
Volume: 596
Issue: 2
Keywords: 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
astro-ph
0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
Publication Status: Published
Appears in Collections:Physics
Astrophysics
Faculty of Natural Sciences



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