303 papers
The ReD experiment utilized a compact dual-phase argon Time Projection Chamber irradiated by neutrons to model-independently measure the ionization yield of argon for nuclear recoils between 2 and 10 keV, revealing higher yields at lower energies than previously observed and extending experimental coverage crucial for detecting low-mass Dark Matter.
This paper investigates the generation of primordial stochastic gravitational waves during the reheating period by calculating the perturbative decay of a coherently oscillating inflaton into massive spin-3/2 particles accompanied by graviton bremsstrahlung, demonstrating that the resulting gravitational wave spectra can provide insights into the microscopic physics of inflation.
The authors introduce the Cosmic-Enu-II emulator, which leverages a fast linear response method and non-linear perturbation theory to significantly improve the accuracy and momentum resolution of modeling massive neutrino clustering across different mass orderings, thereby enabling precise tests of neutrino free-streaming against cosmological bounds.
This paper introduces an efficient ANN-emulator framework for the SCRIPT semi-numerical model that reduces the computational cost of constraining the Epoch of Reionization by up to 70-fold while maintaining statistical fidelity, thereby enabling the analysis of high-dimensional models required for upcoming JWST and 21 cm datasets.
This paper presents a model-independent Bayesian search for double-peaked stochastic gravitational-wave backgrounds in LIGO-Virgo-KAGRA O1–O4a data, finding no significant evidence but establishing crucial constraints and a framework for future targeted spectral shape analyses.
This study employs a Bayesian framework with multi-density constraints to demonstrate that current astrophysical observations cannot statistically distinguish between fermionic and bosonic dark matter scenarios in neutron stars, as both models yield consistent nuclear matter parameters and allow only small dark matter fractions that slightly soften the equation of state without violating observational limits.
This study combines theoretical modeling and observational analysis to demonstrate that anomalous microwave emission spectral features are dominantly controlled by grain size, shape, and environmental parameters, revealing that while molecular and dark clouds are consistent with spinning dust models, HII regions show significant discrepancies likely due to PAH depletion and biased detections.
This paper extends Jacobson's thermodynamic derivation of gravity to non-extensive horizon entropies by introducing a Topological Calibration Principle that links the effective gravitational coupling to the Euler characteristic of spacetime sections, thereby providing a framework to constrain non-extensive parameters and explore cosmological implications.
This paper demonstrates that strong non-gravitational interactions between dark matter and dark energy, which allow for negative energy densities, can naturally drive flat FLRW cosmologies to undergo either a Big Crunch turnaround or a non-singular bounce, and cyclic evolution in closed universes, without requiring modifications to general relativity.
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.