285 papers
This paper proposes a new holographic dark energy model derived from a two-parameter generalized entropic functional, which naturally unifies standard holographic dark energy and CDM cosmology while successfully reproducing the matter-to-dark-energy transition and allowing for diverse dynamical behaviors like quintessence or phantom regimes.
This paper demonstrates that weak lensing analyses can maintain their cosmological constraining power using significantly sparser source galaxy samples ($5\,\text{arcmin}^{-2}$) by leveraging spectroscopic calibration to mitigate redshift uncertainties and intrinsic alignment systematics, thereby enabling direct calibration of dominant errors with instruments like DESI.
This paper presents the public release of OpenGadget3, a cosmological hydrodynamical N-body code featuring a robust implementation of self-interacting dark matter that supports various elastic scattering cross-sections and two-species models, validated through accuracy tests and performance scaling.
This paper utilizes time-resolved optical polarization observations of the Crab pulsar to constrain the axion-photon coupling, demonstrating the potential of pulsar birefringence as a method for detecting axions.
The CHRONOS paper proposes a next-generation cryogenic ground-based gravitational-wave observatory utilizing quantum non-demolition speed-meter technology to bridge the sub-Hz frequency gap, thereby enabling unprecedented long-duration tracking of compact binaries and precise constraints on the stochastic gravitational-wave background to advance astrophysics and cosmology.
This paper investigates the Stodolsky effect within the framework of Generalised Neutrino Interactions for both Dirac and Majorana neutrinos, finding that non-standard and tensor interaction terms yield non-zero contributions beyond the Standard Model, with specific implications for detecting the cosmic neutrino background and analyzing CB asymmetry.
This paper proposes a unified thermodynamic framework where cosmic acceleration emerges from an entropic force driven by a generalized mass-to-horizon scaling relation, and demonstrates through a comprehensive Bayesian analysis of multi-probe observational data that this entropic cosmology is statistically preferred over the standard CDM model.
This paper demonstrates that the threshold for primordial black hole formation in a radiation-dominated universe depends not only on the compaction function but also on the spatial curvature of the core, leading to a trichotomy of initial conditions (open, closed, or flat) that significantly influence formation probabilities, mass spectra, and the potential connection to Type-II black holes and the NanoGrav signal.
This paper theoretically demonstrates that primordial black holes acting as dark matter lenses can induce significant, frequency-dependent distortions in the stochastic gravitational-wave background, offering a novel method to constrain their mass and abundance through future observations.
This paper reformulates the Press-Schechter approach for primordial black holes within the excursion-set framework to demonstrate that, unlike halo formation, the non-Markovian nature of the process invalidates the standard "fudge factor" correction, necessitating a consistent inclusion of both stochastic motion components to derive a physically valid mass function.
This study utilizes 3D soft-sphere coagulation simulations to demonstrate that higher temperatures and polydisperse monomer size distributions lead to denser, more compact dust aggregates, while also evaluating the reliability of eight structural metrics and identifying the average number of contact points as the least effective measure.
This paper introduces and validates two efficient "kurto spectra" estimators that compress the high-dimensional parity-odd trispectrum of galaxy clustering into one-dimensional observables, demonstrating their ability to detect parity violation in cosmological surveys by effectively mitigating noise through phase-matched subtraction and optimal weighting in both dark matter and halo fields.
The paper introduces , a differentiable, JAX-based framework that utilizes neural network emulators to accelerate one-loop EFTofLSS galaxy power spectrum calculations by 3–4 orders of magnitude while maintaining high accuracy, thereby enabling rapid and efficient cosmological inference for upcoming large-scale structure surveys.
This paper presents high-fidelity mock galaxy catalogs for DESI's Bright Galaxy Survey (BGS) and Luminous Red Galaxy (LRG) samples, generated via subhalo abundance matching on the Uchuu simulation, which successfully reproduce observed redshift evolution, clustering statistics, and galaxy-halo connections with high accuracy.
This paper demonstrates that field-level inference using the LEFTfield EFT-based forward model improves constraints on the baryon acoustic oscillation scale by a factor of 1.2–1.4 compared to standard reconstruction methods by explicitly sampling initial conditions alongside bias and noise parameters.
This paper updates the 2024 Big Bang Nucleosynthesis baryon abundance by using the code to marginalize over nuclear reaction rates, revealing that theoretical versus experimental Deuterium burning rates drive significant differences in derived abundances and yielding conservative estimates of with constraints on ultra-relativistic relics.
This paper introduces a novel search framework for precessing binary black hole systems in LIGO-Virgo-KAGRA data that utilizes mode-by-mode filtering, machine learning-based template reduction, and marginalization over harmonic signal-to-noise ratios to overcome the computational and statistical challenges of spin precession, ultimately increasing the sensitive search volume by approximately 10%.
This paper presents a systematic study of the continuum spectrum of spherical multi-frequency Proca stars, demonstrating that they interpolate between discrete stationary states and that a subset of these configurations are linearly stable, with potential implications for determining particle spin in ultralight dark matter models.
This paper establishes a tight relation between the baryonic mass and dynamical mass of extragalactic systems across nine orders of magnitude, revealing that the baryon fraction matches the cosmic value in massive clusters but decreases systematically in lower-mass systems according to a specific tanh-based scaling law.
This paper introduces an unbiased Bayesian method for estimating the radial peculiar velocities of galaxies hosting Type Ia supernovae that relies solely on cosmological models and data precision, avoiding the linearity and fixed-cosmology assumptions of standard estimators to achieve lower bias even for large velocities.