dc.contributor.author | Viljoen, Jan-Albert | |
dc.contributor.author | Fonseca, Jos´e | |
dc.contributor.author | Maartens, Roy | |
dc.date.accessioned | 2021-02-17T07:21:23Z | |
dc.date.available | 2021-02-17T07:21:23Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Viljoen, J. A. et al. (2020). Constraining the growth rate by combining multiple future surveys. Journal of Cosmology and Astroparticle Physics, 2020(09) | en_US |
dc.identifier.uri | 10.1088/1475-7516/2020/09/054 | |
dc.identifier.uri | http://hdl.handle.net/10566/5939 | |
dc.description.abstract | The growth rate of large-scale structure provides a powerful consistency test of
the standard cosmological model and a probe of possible deviations from general relativity.
We use a Fisher analysis to forecast constraints on the growth rate from a combination of
next-generation spectroscopic surveys. In the overlap survey volumes, we use a multi-tracer
analysis to significantly reduce the effect of cosmic variance. The non-overlap individual
survey volumes are included in the Fisher analysis in order to utilise the entire volume. We
use the observed angular power spectrum, which naturally includes all wide-angle and lensing
effects and circumvents the need for an Alcock-Paczynski correction. Cross correlations
between redshift bins are included by using a novel technique to avoid computation of the
sub-dominant contributions. Marginalising over the standard cosmological parameters, as
well as the clustering bias in each redshift bin, we find that the precision on γ improves on
the best single-tracer precision by up to ∼50% | en_US |
dc.language.iso | en | en_US |
dc.publisher | IOP Publishing | en_US |
dc.subject | Dark energy experiments | en_US |
dc.subject | Gravity | en_US |
dc.subject | Modified gravity | en_US |
dc.subject | Galaxy surveys | en_US |
dc.subject | Growth rate | en_US |
dc.title | Constraining the growth rate by combining multiple future surveys | en_US |
dc.type | Article | en_US |