Uniform Newtonian models with variable mass

Details Uniform Newtonian models with variable mass Uniform Newtonian models with variable mass

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gregr..23..455c&link_type=abstract

General Relativity and Gravitation, Volume 23, Issue 4, pp.455-463

Mathematics

Logic

5

Scientific paper

A Newtonian version of the spatially homogeneous and isotropic cosmological models with variable mass is presented. Under the assumption that the mass variation is a strict cosmological effect, its influence on the evolution of the scale function is established for the case of a dust-filled universe. Unlike the usual Newtonian models the present value of the deceleration parameter (q ≏ 1) obtained from the luminosity distance versus redshift relation can be fitted for a time-decreasing mass. It is also shown that the hyperbolic, parabolic or elliptic character of the fluid motion can be modified along the expansion. Likewise, a Friedmann-type equation with a variable “curvature term” indicates that in the frame-work of a full geometric variable mass theory, the same may occur with the open, flat or closed character of the universe spatial section.

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