REVIEW 9 cited by
Scalar field dark energy models: Current and forecast constraints
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
Recent results from Type Ia supernovae (SNe Ia) and baryon acoustic oscillations (BAO), in combination with cosmic microwave background (CMB) measurements, have focused renewed attention on dark energy models with a time-varying equation-of-state parameter, $w(z)$. In this paper, we describe the simplest, physically motivated models of evolving dark energy that are consistent with the recent data, a broad subclass of the so-called thawing scalar field models that we dub $w_\phi$CDM. We provide a quasi-universal, quasi-one-parameter functional fit to the scalar-field $w_\phi(z)$ that captures the behavior of these models more informatively than the standard $w_0w_a$ phenomenological parametrization; their behavior is completely described by the current value of the equation-of-state parameter, $w_0=w(z=0)$. Combining current data from BAO (DESI Data Release 2), the CMB (Planck and ACT), large-scale structure (DES Year-3 $3\times2$pt), SNe Ia (DES-SN5YR), and strong lensing (TDCOSMO + SLACS), for $w_\phi$CDM we obtain $w_0=-0.904_{-0.033}^{+0.034}$, 2.9$\sigma$ discrepant from the $\Lambda$ cold dark matter ($\Lambda$CDM) model. The Bayesian evidence ratio substantially favors this $w_\phi$CDM model over $\Lambda$CDM. The data combination that yields the strongest discrepancy with $\Lambda$CDM is BAO+SNe Ia, for which $w_0=-0.837^{+0.044}_{-0.045}$, $3.6\sigma$ discrepant from $\Lambda$CDM and with a Bayesian evidence ratio strongly in favor. We find that the so-called $S_8$ tension between the CMB and large-scale structure is slightly reduced in these models, while the Hubble tension is slightly increased. We forecast constraints on these models from near-future surveys (DESI-extension and the Vera C. Rubin Observatory LSST), showing that the current best-fit $w_\phi$CDM model will be distinguishable from $\Lambda$CDM at over 9$\sigma$.
Forward citations
Cited by 9 Pith papers
-
Sound Mode and Scale-Dependent Growth in Two-Fluid Dynamical Dark Energy
DDE sound modes induce scale-dependent growth and halo bias comparable to massless neutrinos; multi-tracer P+B forecasts detect it for c_s^{2} ~ 10^{-2}–10^{-4}, while lower speeds produce ~10% drag on cluster growth-...
-
Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale
A simulated sample of 800 LSST lensed AGN, analyzed with a new hierarchical time-delay inference code, is forecast to yield ~2.5% H0 precision and a dark-energy figure of merit of 6.7 in w0waCDM.
-
Implications for dark energy of cosmic transparency in light of DESI data
No deviation found from the distance duality relation in combined DESI, CMB, and supernova data, ruling out dimming as an explanation of the Hubble tension.
-
Examining Quintessence Models with DESI Data
NEC-obeying hilltop and exponential quintessence models give at most marginal improvement over the cosmological constant against DESI 2024 data, and the prominent k=10 hilltop 'excellent mimic' claim is an artifact of...
-
Robust Preference for Dark Sector Interactions
Interacting dark matter–dark energy models fit DESI BAO and CMB data as well as evolving-dark-energy (CPL) models, with a coupling preference that persists under DES-Dovekie supernova recalibration.
-
Cosmology of axion dark energy in supersymmetric models and constraints on high scale parameters
A two-cosine axion dark energy potential fits CMB+BAO+supernova data better than the standard one-cosine potential, while preferring a sub-Planckian decay constant and a feeble dark-matter coupling.
-
Constraints on unimodular diffusion models with latest observables
Unimodular diffusion models with latest DESI/DESY5/Planck data show intermediate-time transitions and only mild, non-decisive preference over ΛCDM without resolving H0.
-
The Lifespan of our Universe
If the axion dark energy model with a negative cosmological constant is the true explanation of DES/DESI data, the universe will end in a big crunch at a total age of about 33 billion years.
-
Breaking Free from the Swampland of Impossible Universes through the DESI Portal
DESI data indicating evolving dark energy may allow string theory to describe observed universes without violating swampland constraints on constant dark energy.
Discussion (0). Sign in to comment.