2013/05/31 by Celine Boehm, Céline Boehm, Syksy Rasanen +1 · 1 citation
Physics and Astronomy · #Consistency (knowledge bases) #Cosmological model #Cosmology #Cosmology and Gravitation Theories #Friedmann–Lemaître–Robertson–Walker metric #Neutrino Physics Research #Particle physics theoretical and experimental studies #Signature (topology) #astro-ph.CO #gr-qc
paper · pdf · doi:10.1088/1475-7516/2013/09/003
published as JCAP09(2013)003 · 24 pages, 14 figures. v2: Corrected binning in figure 1, added a reference. v3: Published version. Added clarifications and a reference
arxiv created 2013/09/04 · openalex publication_date 2013/09/04 · arxiv updated 2013/09/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We propose a backreaction toy model with realistic features and confront it with the Union2.1 supernova data. The model provides a good fit even though the expansion history is quite different from the ΛCDM model and the effective equation of state is far from -1. We discuss compatibility (or lack thereof) with other observations. We show that the FRW consistency condition between distance and expansion rate is violated with an amplitude that is slightly below the current observational limits. We expect that this is also the case in the real universe if backreaction is significant, providing a distinct signature of backreaction.