BEST-FIT COSMOLOGICAL PARAMETERS FROM OBSERVATIONS OF THE LARGE SCALE STRUCTURE OF THE UNIVERSE

Автор(и)

  • B. Novosyadlyj Astronomical observatory, I.Franko State University of Lviv, Kyryla i Mephodia, 8, Lviv 290005, Ukraine, Ukraine
  • S. Apunevych Astronomical observatory, I.Franko State University of Lviv, Kyryla i Mephodia, 8, Lviv 290005, Ukraine, Ukraine
  • R. Durrer Department of Theoretical Physics, University of Geneva, Quai Ernest Ansermet 24, CH-1211 Geneva 4, Switzerland,
  • S. Gottloeber Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-144482 Potsdam, Germany, Ukraine
  • V. Lukash Profsoyuznaya 84/32, 117810 Moscow, Russia, Ukraine

DOI:

https://doi.org/10.18524/1810-4215.1999.12.93104

Ключові слова:

Cosmology, theory, large scale structure of the Universe, dark matter, galaxies, clustering.

Анотація

The possibility to determine cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar velocities of galaxies, the distribution of Ly-α clouds and CMB temperature fluctuations is analyzed. Assuming a flat universe,
ΩΛ + Ωm= 1, with purely scalar perturbations, we show that a χ2 minimization method applied on this data set determines quite precisely the values of the spectral index n of the primordial power spectrum, the baryon and massive neutrino density Ω b and Ω v respectively, the Hubble constant h ≡ H0/(100km / s / Mpc) and the value of the cosmological constant, ΩΛ. Varying all parameters we find that a tilted ΛMDM model with one species of massive neutrinos and the parameters n = 1.13 ± 0.10, Ωm = 0.41 ± 0.11,
Ω v = 0.06 ± 0.028, Ωb = 0.039 ± 0.014 and h = 0.70 ± 0.12 matches the observational data best.

Посилання

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Опубліковано

2017-03-16

Номер

Том 12 (1999)

Розділ

Статті

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