Mathematics – Logic
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64..910i&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Sept.-Oct. 1987, p. 910-918. In Russian.
Mathematics
Logic
Brightness Distribution, Galactic Clusters, Spectrum Analysis, Statistical Analysis, Astronomical Models, Cosmology, Galactic Evolution, Least Squares Method, Red Shift
Scientific paper
The least-squares best fit values of observational parameters to homogeneous Friedmann models and their 95-per cent confidence regions have been computed for the sample of 96 first-ranked cluster galaxies with redshifts 0 < z < 0.4. The effects of the evolutionary correction, photon scattering by free electrons and selective extinction by intergalactic dust on the redshift - magnitude relation have been taken into account. Constraints on the values of the deceleration parameter and cosmological constant are found which are -1.1 ⪉ q0 ⪉ 0.6 and -0.5×10-56 ⪉ Λ ⪉ 1.4×10-56cm-2, respectively, if the Hubble parameter is equal to 50 km/(s Mpc).
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