%0 Generic %1 frion2024bayesian %A Frion, Emmanuel %A Camarena, David %A Giani, Leonardo %A Miranda, Tays %A Bertacca, Daniele %A Marra, Valerio %A Piattella, Oliver F. %D 2024 %K cosmology dark_energy dark_matter hubble_tension %T Bayesian analysis of a Unified Dark Matter model with transition: can it alleviate the $H_0$ tension? %U https://arxiv.org/abs/2307.06320v2 %X We consider cosmological models in which Dark Matter (DM) and Dark Energy (DE) are described by a single component, dubbed Unified Dark Matter (UDM) models, in which the DE-like part can have an equation state <−1 at late times without violating the null energy condition. In this paper, we investigate whether this feature can relieve the Hubble tension. We perform a Bayesian analysis of the model using SNIa data from Pantheon, the CMB distance prior from Planck, and the prior on the absolute magnitude M of SNIa from SH0ES. Using the prior, the data suggests a smooth transition taking place at redshifts zt≃2.85, which provides a value H0=69.64±0.88 for the Hubble constant, slightly alleviating the tension by ∼1.5σ. Without it, we obtain H0=67.6+1.3−0.82 and a transition happening at zt=1.36. We also discuss the importance of using the prior on M for constraining this model.

@misc{frion2024bayesian, abstract = {We consider cosmological models in which Dark Matter (DM) and Dark Energy (DE) are described by a single component, dubbed Unified Dark Matter (UDM) models, in which the DE-like part can have an equation state <−1 at late times without violating the null energy condition. In this paper, we investigate whether this feature can relieve the Hubble tension. We perform a Bayesian analysis of the model using SNIa data from Pantheon, the CMB distance prior from Planck, and the prior on the absolute magnitude M of SNIa from SH0ES. Using the prior, the data suggests a smooth transition taking place at redshifts zt≃2.85, which provides a value H0=69.64±0.88 for the Hubble constant, slightly alleviating the tension by ∼1.5σ. Without it, we obtain H0=67.6+1.3−0.82 and a transition happening at zt=1.36. We also discuss the importance of using the prior on M for constraining this model. }, added-at = {2024-03-13T16:32:39.000+0100}, archiveprefix = {arXiv}, author = {Frion, Emmanuel and Camarena, David and Giani, Leonardo and Miranda, Tays and Bertacca, Daniele and Marra, Valerio and Piattella, Oliver F.}, biburl = {https://www.bibsonomy.org/bibtex/2734eddc6d4a000f1640e486b5cc3b32d/tabularii}, description = {[2307.06320v2] Bayesian analysis of a Unified Dark Matter model with transition: can it alleviate the $H_{0}$ tension?}, eprint = {2307.06320}, interhash = {ea8d0149f1257fefe1a3ded3e6782c0d}, intrahash = {734eddc6d4a000f1640e486b5cc3b32d}, keywords = {cosmology dark_energy dark_matter hubble_tension}, primaryclass = {astro-ph.CO}, timestamp = {2024-03-13T16:32:39.000+0100}, title = {Bayesian analysis of a Unified Dark Matter model with transition: can it alleviate the $H_{0}$ tension?}, url = {https://arxiv.org/abs/2307.06320v2}, year = 2024 }