Abstract
view Abstract Citations (4) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cold Dark Matter versus Baryon-dominated Universes: Comparison with Peculiar Velocity and Acceleration Measurements del Grande, Paola ; Vittorio, Nicola Abstract We discuss how to compare different theoretical models against observations of elliptical galaxy peculiar velocities and IRAS galaxy accelerations. The method is based on a likelihood ratio analysis of the available data and allows one to test pairs of models, one against the other. In principle, it is possible to identify the model most consistent with the observational data. We find that a flat biased (b~1.2) cold dark matter model performs much worse than a low-density model, either cold dark matter ({OMEGA}_0_ = 0.7) or isocurvature baryon ({OMEGA}_0_ = 0.4) dominated. The last two models are both consistent with the observations, and are statistically indistinguishable. However, the recent sparse- sampled QDOT redshift survey seems to indicate that an {OMEGA}_0_ = 0.7 cold dark matter model should be preferred. Publication: The Astrophysical Journal Pub Date: September 1992 DOI: 10.1086/171761 Bibcode: 1992ApJ...397...26D Keywords: Baryons; Cosmology; Dark Matter; Elliptical Galaxies; Infrared Astronomy Satellite; Red Shift; Astronomical Models; Perturbation Theory; Velocity Measurement; Astrophysics; COSMOLOGY: THEORY; COSMOLOGY: DARK MATTER; GALAXIES: DISTANCES AND REDSHIFTS; GALAXIES: ELLIPTICAL AND LENTICULAR; CD full text sources ADS |
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