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Understanding the relativistic overdensity of galaxy surveys | | Didam Duniya
; | | Date: |
30 May 2016 | | Abstract: | The main goal of galaxy surveys is to map the distribution of the galaxies,
for the purpose of understanding the properties of this distribution and its
implications for the content and evolution of the universe. However, in order
to realise the potential of these surveys, we need to ensure that we are using
a correct analysis, i.e. a general relativistic (GR) analysis: which has been
extensively studied recently. In this work, the known GR overdensity of galaxy
surveys is re-examined. Subtle, but crucial parameters which appear to have
been missed by previous works are uncovered. The possible implication of these
parameters on the observed galaxy power spectrum is demonstrated, in the
standard concordance model. The results show that these parameters can alter
the predictions of galaxy clustering on all scales---and hence, the GR effects
(on horizon scales). | | Source: | arXiv, 1606.0712 | | Services: | Forum | Review | PDF | Favorites | |
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