ON THE HUBBLE LAW IN A NONEXPANDING NONSTATIONARY UNIVERSE WITH COSMOLOGICAL CONSTANT

Authors
Citation
W. Petry, ON THE HUBBLE LAW IN A NONEXPANDING NONSTATIONARY UNIVERSE WITH COSMOLOGICAL CONSTANT, Astrophysics and space science, 254(2), 1997, pp. 305-317
Citations number
7
ISSN journal
0004640X
Volume
254
Issue
2
Year of publication
1997
Pages
305 - 317
Database
ISI
SICI code
0004-640X(1997)254:2<305:OTHLIA>2.0.ZU;2-0
Abstract
A nonsingular, homogeneous, isotropic cosmological model with cosmolog ical constant in flat space-time theory of gravitation is studied. The second law of thermodynamics yields a nonexpanding (nonstationary) un iverse without entropy production. At the beginning of the universe ra diation, matter and vacuum energy given by the cosmological constant a re zero and then emerge from gravitational energy. In the course of ti me the energy of radiation and matter decrease whereas the vacuum ener gy increases forever. Light emitted from a distant galaxy loses energy on his way to the observer producing the observed redshift. The veloc ity of light in the past is greater than the present one. This may exp lain superluminal velocities but only for large redshifts. The sum of the density parameters of matter, radiation and vacuum energy is a lit tle greater than one. All the matter can be baryonic. There is no age problem of the universe.