Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...18511303s&link_type=abstract
American Astronomical Society, 185th AAS Meeting, #113.03; Bulletin of the American Astronomical Society, Vol. 26, p.1510
Astronomy and Astrophysics
Astronomy
Scientific paper
We model deviations from uniform expansion of the universe among galaxies and groups of galaxies in the vicinity of the Local Supercluster (cz <= 3000 \kms). The luminosity distribution is defined by 1138 galaxies and groups derived from a database of 3030 galaxies. The trajectories of all 1138 objects are determined by application of a variational principle in which the path is an extrema of the integral of the Lagrangian over time. Paths are constrained by the present day positions in the sky and the redshifts plus the constraint that peculiar velocities at very early times were small compared to Hubble flow. Mass-to-light is assumed constant for all objects within a given run and runs are made for a wide range of mass-to-light ratios and ages of the universe, t_0. Contour maps of chi (2) are generated from the mean square differences in model and observed distance moduli for a subset of 300 galaxies with Tully-Fisher measurements of distance. We report tight constraints for t_o, Omega_0 , the average mass-to-light ratio, and H_0.
Peebles Phillip James Edwin
Shaya Edward J.
Tully Brent R.
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