Dark sector interaction and the supernova absolute magnitude tension
Abstract
It has been intensively discussed if modifications in the dynamics of the Universe at late times are able or not able to solve the H0 tension. On the other hand, it has also been argued that the H0 tension is actually a tension on the supernova absolute magnitude MB. In this work, we robustly constrain MB using Pantheon supernovae Ia sample, baryon acoustic oscillations, and big bang nucleosynthesis data, and assess the MB tension by comparing three theoretical models, namely the standard Λ CDM , the w CDM , and a nongravitational interaction between dark energy (IDE) and dark matter. We find that the IDE model can solve the MB tension with a coupling different from zero at 95% CL, confirming the results obtained using a H0 prior.
- Publication:
-
Physical Review D
- Pub Date:
- September 2021
- DOI:
- 10.1103/PhysRevD.104.063529
- arXiv:
- arXiv:2107.09151
- Bibcode:
- 2021PhRvD.104f3529N
- Keywords:
-
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- E-Print:
- 8 pages, 2 Figures, 2 Tables. Matches the version published in PRD