314 papers
This paper proposes a scenario where grand unified theory breaking produces quasi-stable cosmic strings bounded by superheavy magnetic monopoles, which can collapse to yield an observable monopole density and emit high-frequency gravitational waves detectable by current and future experiments.
This paper reports a high-significance detection of weak gravitational lensing by photometric density ridges in Dark Energy Survey Year 3 data, utilizing improved algorithms to demonstrate that the signal primarily depends on the cosmological parameter .
This paper demonstrates that the orbital eccentricity of massive black hole binaries significantly enhances LISA's parameter estimation capabilities, leading to a substantial increase in the number of bright standard sirens and resulting in markedly tighter cosmological constraints on parameters such as the Hubble constant and dark energy.
This paper proposes a framework demonstrating that dark matter subhaloes can erase Galactic bar resonances by diffusing stars out of their resonant action space, thereby offering a method to constrain the subhalo mass function and dark matter properties based on the observed persistence of these resonant features.
This study utilizes a cosmological galaxy evolution simulation with dust treatment to demonstrate that the observed increase in dust temperature with redshift is primarily driven by higher star formation rate surface densities and lower dust-to-gas ratios, rather than variations in grain properties.
This study demonstrates that self-interacting dark matter models, particularly those with large cross-sections, can explain the diverse dark matter density profiles of Milky Way ultra-faint dwarf galaxies by showing that most have undergone gravothermal collapse accelerated by tidal stripping.
This paper introduces a fast deep generative framework that significantly accelerates high-dimensional Bayesian posterior sampling compared to diffusion-based methods, successfully demonstrating its robustness and effectiveness in recovering unlensed CMB power spectra for cosmological delensing applications.
The paper introduces Beyond21, a fast, open-source Python package that provides a unified framework for modeling the Cosmic Dawn and Epoch of Reionization to predict global 21-cm signals and other observables, while enabling flexible exploration of both standard astrophysics and beyond-Standard-Model scenarios like millicharged dark matter.
By analyzing 69 globular clusters with a hierarchical framework that explicitly accounts for multiple stellar populations, this study confirms that such complexity has a negligible impact on age estimates, yielding a robust, model-independent age for the Universe of $13.81 \pm 0.32$ Gyr.
This study presents a Euclid follow-up of a galaxy cluster candidate, revealing an overdense population of blue galaxies and a merging proto-Brightest Cluster Galaxy that illustrates a common multi-object merger formation process, suggesting Euclid will discover approximately 400 such assembling systems by the end of its mission.
Using the FirstLight simulations and synthetic JWST images, this study reveals that galaxy sizes at cosmic dawn ( to ) evolve rapidly due to increasing galaxy efficiency and complex dust attenuation effects, establishing a diverse size-mass relation early on where compact galaxies exhibit higher specific star-formation rates.
This paper investigates how a two-fluid dynamical dark energy model, which supports sound-wave-like perturbations and allows crossing the phantom divide, induces scale-dependent halo bias comparable to neutrino effects, demonstrating that multi-tracer analyses of galaxy power and bispectra can detect these features and constrain the dark energy sound speed.
This paper proposes that including third-order gravitational waves within the scalar-induced gravitational wave framework can enhance the spectral amplitude of the PTA signal, thereby alleviating the theoretical tension of primordial black hole overproduction while maintaining consistency with cosmological constraints and supermassive black hole binary backgrounds.
This paper presents a fully Bayesian reanalysis of DESI DR2 data combined with CMB and supernovae, demonstrating that while frequentist methods suggest strong evidence for dynamical dark energy, Bayesian model selection largely favors the standard CDM model once calibration errors in the DES-SN5YR supernova data are corrected, revealing that the apparent tension was driven by systematic errors rather than new physics.
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.