Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382l..59p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 382, Dec. 1, 1991, p. L59-L62.
Astronomy and Astrophysics
Astronomy
20
Astronomical Models, Cosmology, Dark Matter, Galactic Clusters, Many Body Problem, Sky Surveys (Astronomy), Gravitational Effects, Infrared Astronomy Satellite, Power Spectra, Relic Radiation
Scientific paper
The results of the recent IRAS survey are used to explore constraints on the nature of the Galaxy density field. Realistic simulations of the survey made from N-body simulations of the n = -1 power-law power spectrum and the Omega = 1 CDM models show that the power-law model is basically consistent with all QDOT variance results, while the CDM model has a smaller variance than the observation at the 20/h Mpc Gaussian smoothing scale. It is concluded that the QDOT results are best explained if the power spectrum of the Galaxy density field has a slope of about -1 near a wavelength of about 100/h Mpc, while the CDM model has a slope of about 0 at that scale. The possibility of marginal non-Gaussian behavior at the 20/h Mpc scale reported by Saunders et al. (1990) is examined for gravitational instability models with Gaussian initial conditions. It is argued that the observed (delta exp 3) versus (delta exp 2) in redshift space is not what these models would predict.
No associations
LandOfFree
Constraints on cosmological models from the IRAS QDOT survey results does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraints on cosmological models from the IRAS QDOT survey results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on cosmological models from the IRAS QDOT survey results will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1536655