Hubble expansion variance and the cosmic rest frame

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Conference Contributions - Other
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Publisher
University of Canterbury. Physics and Astronomy
Journal Title
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Date
2014
Authors
Wiltshire, D.L.
Smale, P.R, Mattsson, T.
Watkins, R.
Nazer, M.A.
Bolejko, K.
McKay, J.H.
Abstract

Average homogeneity is only reached on scales greater than 70{100h􀀀1Mpc yet standard peculiar velocity approaches assume an most Euclidean geometry below this scale. Furthermore, the Friedmann equation is applied in the nonlinear regime, although this has no motivation in the fundamental principles of general relativity. We investigate the variance of the Hubble expansion in a manner which makes no prior geometrical assumptions, other than the existence of a suitably averaged linear Hubble law. We use the COMPOSITE data set of 4534 galaxies [Watkins, Feldman and Hudson (2009)].

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Citation
Wiltshire, D.L., Smale, P.R, Mattsson, T., Watkins, R., Nazer, M.A., Bolejko, K., McKay, J.H. (2014) Hubble expansion variance and the cosmic rest frame. Tallinn, Estonia: IAU Symposium 308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web, 23-28 June 2014.
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ANZSRC fields of research
Fields of Research::51 - Physical sciences::5101 - Astronomical sciences::510103 - Cosmology and extragalactic astronomy
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