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

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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 Ω m = 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.

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  1. Astronomical observatory of Kyiv Taras Shevchenko University, 3, Observatornaya str., Kyiv, 04053, Ukraine

    S. L. Parnovsky, P. Yu Sharov & O. Z. Gaydamaka

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  1. S. L. Parnovsky
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  2. P. Yu Sharov
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  3. O. Z. Gaydamaka
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Correspondence to S. L. Parnovsky.

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Parnovsky, S.L., Sharov, P.Y. & Gaydamaka, O.Z. Estimation of cosmological parameters from peculiar velocities of flat EDGE-ON galaxies. Astrophys Space Sci 302, 207–211 (2006). https://doi.org/10.1007/s10509-005-9030-7

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  • DOI: https://doi.org/10.1007/s10509-005-9030-7

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