Estimation of cosmological parameters from peculiar velocities of flat EDGE-ON galaxies |
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Authors: | S L Parnovsky P Yu Sharov O Z Gaydamaka |
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Institution: | (1) Astronomical observatory of Kyiv Taras Shevchenko University, 3, Observatornaya str., Kyiv, 04053, Ukraine |
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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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Keywords: | cosmological parameters galaxies peculiar velocities |
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