A new method to test the model of the universe

Details A new method to test the model of the universe A new method to test the model of the universe

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261..377l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 2, p. 377-381.

Statistics

Computation

10

Astronomical Models, Cosmology, Quasars, Universe, Bubbles, Computational Astrophysics, Hubble Constant, Red Shift, Regression Analysis

Scientific paper

Recently Hoell and Preister (1991) showed that the analysis of the Ly-alpha forest in quasar spectra suggests a homogeneous bubble structure up to a redshift of z = 4.4 if the universe is represented by a Friedmann-Lemaitre model with an actual expansion rate of 90 km/(s Mpc) and an age of 30 x 10 exp 9 yr. We present a simple analytic method to derive the model parameters from the Ly-alpha forest of high-resolution quasar spectra supposing the bubble structure to be homogeneous (i.e., with a typical comoving size parameter X independent of position and time). Our regression analysis yields the values of Omega(0) and lambda(0). We also obtain the typical bubble size in a model-independent way and estimate that the number of bubbles filling the universe is of the order of 10 exp 9. The interpretation of the Ly-alpha forest if caused by our homogeneous bubble structure rules out all cosmological standard models with Lambda = 0.

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