Bayesian analysis of a Unified Dark Matter model with transition: can it alleviate the $H_{0}$ tension?
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 $z_{\rm t} \simeq 2.85$, which provides a value $H_0=69.64\pm 0.88$ for the Hubble constant, slightly alleviating the tension by $\sim 1.5 \sigma$. Without it, we obtain $H_0 = 67.6^{+1.3}_{-0.82}$ and a transition happening at $z_t=1.36$. We also discuss the importance of using the prior on $M$ for constraining this model..
| Medienart: |
|
|---|
Preprint| Erscheinungsjahr: |
2023 |
|---|---|
| Erschienen: |
2023 |
| Enthalten in: |
arXiv.org - (2023) vom: 12. Juli Zur Gesamtaufnahme - year:2023 |
|---|
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Frion, Emmanuel [VerfasserIn] |
|---|
| Links: |
Volltext [kostenfrei] |
|---|
| Themen: |
|---|
| Förderinstitution / Projekttitel: |
|
|---|
| PPN (Katalog-ID): |
XCH042758971 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | XCH042758971 | ||
| 003 | DE-627 | ||
| 005 | 20240306114442.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 240306s2023 xx |||||o 00| ||eng c | ||
| 035 | |a (DE-627)XCH042758971 | ||
| 035 | |a (chemrXiv)2307.06320 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Frion, Emmanuel |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Bayesian analysis of a Unified Dark Matter model with transition: can it alleviate the $H_{0}$ tension? |
| 264 | 1 | |c 2023 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 520 | |a 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 $z_{\rm t} \simeq 2.85$, which provides a value $H_0=69.64\pm 0.88$ for the Hubble constant, slightly alleviating the tension by $\sim 1.5 \sigma$. Without it, we obtain $H_0 = 67.6^{+1.3}_{-0.82}$ and a transition happening at $z_t=1.36$. We also discuss the importance of using the prior on $M$ for constraining this model. | ||
| 650 | 4 | |a Astrophysics - Cosmology and Nongalactic Astrophysics |7 (dpeaa)DE-84 | |
| 650 | 4 | |a 530 |7 (dpeaa)DE-84 | |
| 700 | 1 | |a Camarena, David |4 aut | |
| 700 | 1 | |a Giani, Leonardo |4 aut | |
| 700 | 1 | |a Miranda, Tays |4 aut | |
| 700 | 1 | |a Bertacca, Daniele |4 aut | |
| 700 | 1 | |a Marra, Valerio |4 aut | |
| 700 | 1 | |a Piattella, Oliver F. |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t arXiv.org |g (2023) vom: 12. Juli |
| 773 | 1 | 8 | |g year:2023 |g day:12 |g month:07 |
| 856 | 4 | 0 | |u https://arxiv.org/abs/2307.06320 |z kostenfrei |3 Volltext |
| 912 | |a GBV_XCH | ||
| 951 | |a AR | ||
| 952 | |j 2023 |b 12 |c 07 | ||