REVIEW 7 cited by
Exploring the baryonic effect signature in the Hyper Suprime-Cam Year 3 cosmic shear two-point correlations on small scales: the $S_8$ tension remains present
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
The baryonic feedback effect is considered as a possible solution to the so-called $S_8$ tension indicated in cosmic shear cosmology. The baryonic effect is more significant on smaller scales, and affects the cosmic shear two-point correlation functions (2PCFs) with different scale- and redshift-dependencies from those of the cosmological parameters. In this paper, we use the Hyper Suprime-Cam Year 3 (HSC-Y3) data to measure the cosmic shear 2PCFs ($\xi_{\pm}$) down to 0.28 arcminutes, taking full advantage of the high number density of source galaxies in the deep HSC data, to explore a possible signature of the baryonic effect. While the published HSC analysis used the cosmic shear 2PCFs on angular scales, which are sensitive to the matter power spectrum at $k\lesssim 1~h{\rm Mpc}^{-1}$, the smaller scale HSC cosmic shear signal allows us to probe the signature of matter power spectrum up to $k\simeq 20~h{\rm Mpc}^{-1}$. Using the accurate emulator of the nonlinear matter power spectrum, DarkEmulator2, we show that the dark matter-only model can provide an acceptable fit to the HSC-Y3 2PCFs down to the smallest scales. In other words, we do not find any clear signature of the baryonic effects or do not find a systematic shift in the $S_8$ value with the inclusion of the smaller-scale information as would be expected if the baryonic effect is significant. Alternatively, we use a flexible 6-parameter model of the baryonic effects, which can lead to both enhancement and suppression in the matter power spectrum compared to the dark matter-only model, to perform the parameter inference of the HSC-Y3 2PCFs. We find that the small-scale HSC data allow only a fractional suppression of up to 5 percent in the matter power spectrum at $k\sim 1~h{\rm Mpc}^{-1}$, which is not sufficient to reconcile the $S_8$ tension.
Forward citations
Cited by 7 Pith papers
-
De-baryonifying halos via optimal transport
A proof-of-concept method de-baryonifies halos by sampling gravity-only maps at fixed optimal transport cost from the full-physics map, recovering the correct convergence power spectrum suppression in IllustrisTNG.
-
Cosmic voids evolution in modified gravity via hydrodynamics
Voids in luminal Galileon gravity are always unscreened, and a reality requirement on the fifth force rules out ~82% of the favored parameter space, yielding a redshift-dependent minimum void depth.
-
Cosmology and Source Redshift Constraints from Galaxy Clustering and Tomographic Weak Lensing with HSC Y3 and SDSS using the Point-Mass Correction Model
Galaxy clustering plus weak lensing from HSC Y3 and SDSS gives S8 = 0.780 ± 0.030 and lensing-only redshift offsets Δz3 = -0.112, Δz4 = -0.185.
-
It's not $\sigma_8$ : constraining the non-linear matter power spectrum with the Dark Energy Survey Year-5 supernova sample
Weak lensing magnification of 1,484 DES Year-5 supernovae constrains the non-linear matter power amplitude A_mod = 0.77 (+0.69/-0.40), consistent with unity, with a weak hint of suppression.
-
On the equivalence between galaxy angular correlation function and power spectrum in constraining primordial non-Gaussianity
Scale cuts break the equivalence between the galaxy angular power spectrum and the angular correlation function for primordial non-Gaussianity, with the correlation function retaining fNL information on surprisingly s...
-
An optimal quadratic estimator for window-free cosmic shear power spectra
A window-free quadratic estimator that is statistically optimal when the true covariance is known improves cosmic shear E-mode precision by 5–15% at ℓ≲500 and suppresses E→B leakage.
-
Assessing the growth of structure over cosmic time with CMB lensing
CMB lensing auto-spectra from Planck, ACT, and SPT agree with the LambdaCDM growth prediction, suggesting the S8 tension comes from low redshift or small scales.
Discussion (0). Continue with ORCID to comment.