Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle
| dc.contributor.author | February, Sean | |
| dc.contributor.author | Clarkson, Chris | |
| dc.contributor.author | Maartens, Roy | |
| dc.date.accessioned | 2016-08-13T18:04:17Z | |
| dc.date.available | 2016-08-13T18:04:17Z | |
| dc.date.issued | 19 | |
| dc.date.updated | 2016-08-12T09:29:22Z | |
| dc.description.abstract | A suggested solution to the dark energy problem is the void model, where accelerated expansion is replaced by Hubble-scale inhomogeneity. In these models, density perturbations grow on a radially inhomogeneous background. This large scale inhomogeneity distorts the spherical Baryon Acoustic Oscillation feature into an ellipsoid which implies that the bump in the galaxy correlation function occurs at different scales in the radial and transverse correlation functions. We compute these for the first time, under the approximation that curvature gradients do not couple the scalar modes to vector and tensor modes. The radial and transverse correlation functions are very different from those of the concordance model, even when the models have the same average BAO scale. This implies that if void models are fine-tuned to satisfy average BAO data, there is enough extra information in the correlation functions to distinguish a void model from the concordance model. We expect these new features to remain when the full perturbation equations are solved, which means that the radial and transvers. | en_ZA |
| dc.identifier.apacitation | February, S., Clarkson, C., & Maartens, R. (19). Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle. <i>Journal of Cosmology and Astroparticle Physics</i>, http://hdl.handle.net/11427/21222 | en_ZA |
| dc.identifier.chicagocitation | February, Sean, Chris Clarkson, and Roy Maartens "Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle." <i>Journal of Cosmology and Astroparticle Physics</i> (19) http://hdl.handle.net/11427/21222 | en_ZA |
| dc.identifier.citation | February, S., Clarkson, C., & Maartens, R. (2013). Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle. Journal of Cosmology and Astroparticle Physics, 2013(03), 023. | en_ZA |
| dc.identifier.issn | 1475-7516 | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - February, Sean AU - Clarkson, Chris AU - Maartens, Roy AB - A suggested solution to the dark energy problem is the void model, where accelerated expansion is replaced by Hubble-scale inhomogeneity. In these models, density perturbations grow on a radially inhomogeneous background. This large scale inhomogeneity distorts the spherical Baryon Acoustic Oscillation feature into an ellipsoid which implies that the bump in the galaxy correlation function occurs at different scales in the radial and transverse correlation functions. We compute these for the first time, under the approximation that curvature gradients do not couple the scalar modes to vector and tensor modes. The radial and transverse correlation functions are very different from those of the concordance model, even when the models have the same average BAO scale. This implies that if void models are fine-tuned to satisfy average BAO data, there is enough extra information in the correlation functions to distinguish a void model from the concordance model. We expect these new features to remain when the full perturbation equations are solved, which means that the radial and transvers. DA - 19 DB - OpenUCT DP - University of Cape Town J1 - Journal of Cosmology and Astroparticle Physics LK - https://open.uct.ac.za PB - University of Cape Town PY - 19 SM - 1475-7516 T1 - Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle TI - Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle UR - http://hdl.handle.net/11427/21222 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/21222 | |
| dc.identifier.vancouvercitation | February S, Clarkson C, Maartens R. Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle. Journal of Cosmology and Astroparticle Physics. 19; http://hdl.handle.net/11427/21222. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | IOP Publishing | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.source | Journal of Cosmology and Astroparticle Physics | en_ZA |
| dc.source.uri | http://iopscience.iop.org/journal/1475-7516 | |
| dc.subject.other | galaxy clustering | |
| dc.subject.other | baryon acoustic oscillations | |
| dc.subject.other | cosmological perturbation theory | |
| dc.title | Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |