REVIEW 10 cited by
Suppression without Thawing: Constraining Structure Formation and Dark Energy with Galaxy Clustering
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
We present a new perturbative full-shape analysis of BOSS galaxy clustering data, including the full combination of the galaxy power spectrum and bispectrum multipoles, baryon acoustic oscillations, and cross-correlations with the gravitational lensing of cosmic microwave background measured from \textit{Planck}. Assuming the $\Lambda$CDM model, we constrain the matter density fraction $\Omega_m = 0.3138\pm 0.0086$, the Hubble constant $H_0=68.23\pm 0.78\,\mathrm{km}\,\mathrm{s}^{-1}\mathrm{Mpc}^{-1}$, and the mass fluctuation amplitude $\sigma_8=0.688\pm 0.026$ (equivalent to $S_8 = 0.703\pm 0.029$). Cosmic structure at low redshifts appears suppressed with respect to the Planck $\Lambda$CDM concordance model at $4.5\sigma$. We explore whether this tension can be explained by the recent DESI preference for dynamical dark energy (DDE): the BOSS data combine with DESI BAO and PantheonPlus supernovae competitively compared to the CMB, yielding no preference for DDE, but the same $\sim 10\%$ suppression of structure, with dark energy being consistent with a cosmological constant at 68\% CL. Our results suggest that either the data contains residual systematics, or more model-building efforts may be required to restore cosmological concordance.
Forward citations
Cited by 10 Pith papers
-
Constraining Dynamical Dark Energy from Galaxy Clustering with Simulation-Based Priors
Adding BOSS galaxy clustering with simulation-based priors modeled as Gaussian mixtures shifts the DESI plus CMB plus supernova constraints on dark energy toward a cosmological constant and improves the w0-wa figure o...
-
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-...
-
Reanalyzing DESI DR1: 5. Cosmological Constraints with Simulation-Based Priors
Simulation-based priors applied to DESI DR1 full-shape data sharpen cosmological constraints (σ8 error halved) and yield Mν<0.090 eV in w0waCDM, but the results depend on HOD modeling assumptions.
-
An analytic approximation to the covariance between pre- and post-reconstruction galaxy two-point statistics
A simple analytic formula built from the Gaussian disconnected covariance and a perturbative pre-post cross-power spectrum reproduces the simulation-estimated cross-covariance well enough for cosmological inference.
-
Reanalyzing DESI DR1: 4. Percent-Level Cosmological Constraints from Combined Probes and Robust Evidence for the Normal Neutrino Mass Hierarchy
A combined-analysis of DESI galaxy clustering, CMB lensing, BAO, CMB, and supernovae yields percent-level Lambda-CDM parameters, improved dark-energy figure-of-merit, and neutrino-mass bounds that disfavor the inverte...
-
One-Loop Galaxy Bispectrum: Consistent Theory, Efficient Analysis with COBRA, and Implications for Cosmological Parameters
Using the COBRA basis, the one-loop EFT galaxy bispectrum runs in about one second per cosmology and recovers the input cosmology of PTChallenge simulations up to k_max = 0.15 h/Mpc (monopole) and 0.12 h/Mpc (higher m...
-
Cosmology from Planck CMB Lensing and DESI DR1 Quasar Tomography
DESI DR1 quasars cross-correlated with Planck PR4 lensing give sigma8 = 0.929 and S8 = 0.922, about 1.5 sigma above Planck's LCDM prediction, and a sound-horizon-free H0 = 69.1 km/s/Mpc.
-
Projecting Unequal Time Fields and Correlators of Large Scale Structure
A new field-level projection produces first-order unequal-time corrections to single-tracer galaxy power spectra, both within and between redshift bins.
-
Bounds on Velocity-Dependent Dark Matter-Baryon Scattering from Large-Scale Structure
BOSS full-shape data do not tighten Planck bounds on velocity-dependent dark matter-baryon scattering, but adding a DES S8 prior yields a greater than 2 sigma preference for a velocity-independent cross section and lo...
-
The DESI DR1/DR2 evidence for dynamical dark energy is biased by low-redshift supernovae
The DESI dynamical dark energy preference drops below 2 sigma after correcting a 0.043 mag intercept discrepancy in the low-redshift supernovae of DESY5.
Discussion (0). Continue with ORCID to comment.