Other
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63..839k&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 63, Sept.-Oct. 1986, p. 839-844. In Russian.
Other
2
Astronomical Models, Big Bang Cosmology, Space Density, String Theory, Galactic Evolution
Scientific paper
It is shown that the solution of the Friedmann equation with negative vacuum density and with account for the density of strings going beyond the horizon (infinite strings) is the same for spaces of negative, zero, and positive curvature. The model presented satisfies the value of the deceleration parameter q0 = 0.5, of the expansion parameter H0 = 50 km/s Mpc, and yields the age of the Universe from the beginning of the expansion of 16 billion years. The model also predicts a stop in the expansion and the subsequent contraction of the Universe. For a flat space and for the present density of the nonrelativistic matter 5×10-31g/cm3 the model yields the vacuum density -2×10-30g/cm3, the string density 6×10-30g/cm3; the stop will occur 43 billion years after the beginning of the expansion. Other features of the model as well as possible observational tests are discussed.
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