320 papers
This paper investigates the cosmological viability of a specific gravity model by constraining its parameters using MCMC simulations on combined observational Hubble, supernova, and large-scale structure datasets, ultimately comparing its ability to explain late-time accelerated expansion and cosmic structure growth against the standard CDM model.
By cross-correlating cosmic shear, thermal Sunyaev-Zel'dovich, and X-ray data, this study develops a physical model that jointly constrains the spatial distribution and thermodynamic properties of hot gas while highlighting the necessity of accounting for X-ray AGN contamination and non-thermal pressure support to resolve parameter tensions.
This paper proposes an analytical forward-modeling framework using Hamiltonian Monte Carlo to reconstruct the three-dimensional Lyman-alpha power spectrum from various two-point statistics, demonstrating its ability to achieve 13% average precision on DESI-like mock data for consistency checks.
This paper introduces quintuple numbers, a novel algebraic system integrated into the AnaCal framework, to analytically derive the shear responses of galaxy model-fitting parameters and demonstrates that this approach achieves a multiplicative bias below 0.003 for ground-based, oversampled images.
Using SDSS DR18 data, this study demonstrates that while environmental quenching dominates in low-mass galaxies across the cosmic web, massive galaxies () exhibit divergent evolutionary pathways where those in low-density sheets retain gas and star formation unlike their quenched, morphologically transformed cluster counterparts, highlighting the cosmic web as an active driver of galaxy evolution beyond simple mass dependence.
This paper demonstrates that the LuSEE-Night lunar pathfinder radio telescope can produce low-resolution (~5-degree) maps of the sub-50 MHz sky by applying a Wiener filter-based linear map-making algorithm that effectively marginalizes systematic effects such as beam uncertainty and gain fluctuations.
This paper reports the confirmation of two new lensed quasars and the identification of 12 likely lensed quasars and eight new lensed galaxies by cross-matching 1,724 candidates from imaging surveys with DESI DR1 and P200 spectroscopy, demonstrating the efficiency of wide-field spectroscopic surveys in validating strong lens systems.
This paper proposes a new definition of Horndeski theory based on closure under invertible pure disformal transformations and the inclusion of minimal Horndeski theory, which successfully recovers the standard single-field action and provides a practical framework for constructing multi-field extensions that encompass known antisymmetric structures.
This paper investigates how the decay of a secluded scalar field, specifically a dark glueball, into gravitons versus Standard Model particles is influenced by non-minimal gravitational couplings and conformal symmetry breaking, revealing that a large Higgs-gravity coupling suppresses graviton dark radiation while favoring Standard Model reheating, and subsequently derives the resulting gravitational-wave spectrum.
The paper introduces CUBE2, an open-source, memory-efficient, and scalable cosmological -body simulation code that combines a multi-level Particle-Mesh method with optimized Green's functions and Information Optimized Storage to achieve high precision and performance, validated by successfully running $6144^3$ particle simulations on the ACECS supercomputer.
This paper critiques the CDM model proposed by A. Lapi et al., arguing that their claim that standard cold dark matter fluctuations alone can drive cosmic acceleration is implausible and highlighting broader issues with cosmological back-reaction frameworks.
The AIDA-TNG project utilizes cosmological simulations to demonstrate that alternative dark matter models, specifically warm and self-interacting variants, significantly alter halo abundance, radial distribution, and clustering properties, with small-scale clustering emerging as a key discriminator for future observational comparisons.
This study utilizes the COSMOS2020 dataset to demonstrate that the fractal dimension of the cosmic web varies systematically with galaxy color and redshift, revealing a distinct hierarchy where blue galaxies exhibit the highest dimensionality and green galaxies the lowest, thereby establishing fractal dimension as a sensitive diagnostic for mapping large-scale structure evolution.
This paper analyzes full Planck 2018 and BICEP/Keck 2018 CMB data to constrain stable cosmic string and domain wall networks, finding no statistically significant evidence for defects but observing a mild preference for non-zero cosmic string tension while significantly improving constraints and forecasting future sensitivities for upcoming experiments.
This study utilizes end-to-end simulations of CHEX-MATE-like galaxy clusters to demonstrate that while current X-ray analysis techniques can robustly recover gas density and mass profiles, they face significant challenges and potential biases in accurately measuring temperature profiles due to azimuthal variations and multi-temperature gas along the line of sight.
This paper proposes utilizing the line-of-sight shear of strong gravitational lenses detected in Stage-IV surveys as a new cosmological probe, demonstrating through analytical derivations and covariance analysis that this approach significantly enhances the standard $3\times 26\times 2$pt scheme with high signal-to-noise ratio and potential for mitigating systematic errors.
This paper demonstrates that a small mismatch between the standard analytic sound-horizon scale and the effective scale imprinted in matter clustering can introduce significant systematic biases in cosmological inference for future high-precision surveys like DESI, and proposes strategies to correct for or budget this effect.
This paper presents a complete and predictive set of thermal-relic targets for sub-GeV dark matter coupled to vector mediators in minimal anomaly-free U(1) extensions of the Standard Model, enabling robust discovery or falsification through electron recoil direct detection experiments.
This review explores how multi-messenger astronomy and diverse observational data across various scales constrain and probe extensions to the Standard Model and General Relativity, including dark matter candidates and modified gravity theories, to illuminate the nature of the dark sector.
This study utilizes the latest DESI DR2 BAO and cosmic chronometer data to constrain time-varying vacuum CDM models, finding that observations strongly favor the standard CDM limit while significantly reducing parameter degeneracies and alleviating the Hubble tension.