Latest evidence for a late time vacuum -- geodesic CDM interaction
| Autor: | Robert Crittenden, Marco Bruni, Simone Peirone, Natalie B. Hogg, Matteo Martinelli |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
ST/S000550/1
Cold dark matter Cosmology and Nongalactic Astrophysics (astro-ph.CO) Geodesic Dark matter FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics ST/N504245/1 01 natural sciences Cosmology dark matter Theoretical physics Vacuum energy 0103 physical sciences dark energy 010303 astronomy & astrophysics STFC Physics 010308 nuclear & particles physics RCUK Astronomy and Astrophysics Bayes factor Redshift Space and Planetary Science Dark energy cosmology Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Hogg, N, Bruni, M, Crittenden, R, Martinelli, M & Peirone, S 2020, ' Latest evidence for a late time vacuum-geodesic CDM interaction ', Physics of the Dark Universe, vol. 29, 100583 . https://doi.org/10.1016/j.dark.2020.100583 |
| DOI: | 10.48550/arxiv.2002.10449 |
| Popis: | We perform a reconstruction of the coupling function between vacuum energy and geodesic cold dark matter using the latest observational data. We bin the interaction in seventeen redshift bins but use a correlation prior to prevent rapid, unphysical oscillations in the coupling function. This prior also serves to eliminate any dependence of the reconstruction on the binning method. We use two different forms of the correlation prior, finding that both give similar results for the reconstruction of the dark matter -- dark energy interaction. Calculating the Bayes factor for each case, we find no meaningful evidence for deviation from the null interacting case, i.e. $\Lambda$CDM, in our reconstruction. Comment: 14 pages, 7 figures. Version 2 matches published version in Physics of the Dark Universe (Figure 2 updated to better show H0 and sigma 8 tensions, additional discussion of results added in section 4.1) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|