Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...399....1u&link_type=abstract
Astronomy and Astrophysics, v.399, p.1-7 (2003)
Astronomy and Astrophysics
Astrophysics
4
Cosmology: Large-Scale Structure Of Universe, Methods: Numerical, Statistic
Scientific paper
Using a graph-theoretical approach, we compared the galaxy distributions in a flux-limited galaxy sample extracted from the Lyon-Meudon Extragalactic Database (``the LEDA subsample'') with those in cosmological N-body simulations. To derive information on the density parameter of our Universe, we used CDM simulations with (Omega_0 , lambda_0 ) = (0.1, 0.9), (0.5, 0.5), (1.0, 0.0), and prepared artificial samples. Constellation graphs were constructed from the galaxy distributions in the LEDA subsample and those in these artificial samples, and graph theory was applied. For statistical comparison, the mean absolute deviations of the distribution functions of the eigenvalues of the adjacency matrices were calculated. From our analysis we found that a low-density parameter is preferable, although the LEDA subsample we used in this study is not deep enough to provide a definite estimate of the cosmological parameter set of the Universe.
Itoh Makoto
Takeuchi Tadashi
Ueda Hiroaki
No associations
LandOfFree
A graph-theoretical approach for comparison of observational galaxy distributions with cosmological N-body simulations 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 A graph-theoretical approach for comparison of observational galaxy distributions with cosmological N-body simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A graph-theoretical approach for comparison of observational galaxy distributions with cosmological N-body simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-917882