Astrophysics and Space Science

, Volume 302, Issue 1, pp 207–211

Estimation of cosmological parameters from peculiar velocities of flat EDGE-ON galaxies

Authors

    • Astronomical observatory of Kyiv Taras Shevchenko University
  • P. Yu Sharov
    • Astronomical observatory of Kyiv Taras Shevchenko University
  • O. Z. Gaydamaka
    • Astronomical observatory of Kyiv Taras Shevchenko University
Original Article

DOI: 10.1007/s10509-005-9030-7

Cite this article as:
Parnovsky, S.L., Sharov, P.Y. & Gaydamaka, O.Z. Astrophys Space Sci (2006) 302: 207. doi:10.1007/s10509-005-9030-7
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Abstract

We estimate the values of the cosmological parameters using the data about peculiar velocities of 1493 flat edge-on spirals from the RFGC catalogue. The obtained values Ωm = 0.21− 0.09+ 0.22, σ8 = 1.07− 0.24+ 0.28 differ from the WMAP values by approximately 2–3σ, but well agree with modern constraints on these parameters. Due to a strong correlation between these quantities the shape of the 1σ, 2σ and 3σ-boundaries are rather narrow. This gives us the opportunity to use this estimation to verify the corresponding values, obtained by different methods.

Keywords

cosmological parametersgalaxiespeculiar velocities
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© Springer Science+Business Media, Inc. 2006