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Title of Journal: Astrophys Space Sci

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Abbravation: Astrophysics and Space Science

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Springer Netherlands

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DOI

10.1002/ecja.20142

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1572-946X

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Largescale collective motion of RFGC galaxies in

Authors: S L Parnovsky A S Parnowski
Publish Date: 2010/09/11
Volume: 331, Issue: 2, Pages: 429-440
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Abstract

We consider the largescale collective motion of flat edgeon spiral galaxies from the Revised Flat Galaxy Catalogue RFGC taking into account the curvature of the spacetime in the Local Universe at the scale 100h −1 Mpc We analyse how the relativistic model of the collective motion should be modified to provide the best possible values of the parameters the effects that impact these parameters and ways to mitigate them Evolution of galactic diameters selection effects and the difference between isophotal and angular diameter distances are inadequate to explain this impact At the same time the measurement error in H i line widths and angular diameters can easily provide such an impact This is illustrated by a toy model which allows analytical consideration and then in the full model using Monte Carlo simulations The resulting velocity field is very close to that provided by the nonrelativistic model of the collective galactic motion The obtained bulk flow velocity is consistent with the ΛCDM cosmology

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