316 papers
This study utilizes open multifrequency astronomical data to construct visual and auditory representations of nine blazars via MIDI and Parameter Mapping Sonification, demonstrating how this multimodal approach effectively reveals variability patterns and promotes inclusive scientific communication.
This paper investigates the impact of strongly-interacting dark matter, modeled by a first-principles QCD-like gauge theory, on neutron star structure and confirms that such dark matter can be accommodated within current observational constraints.
This paper demonstrates that the modified gravity theory, through a non-minimal matter-curvature coupling, allows for stable super-Chandrasekhar white dwarf configurations and uses Bayesian inference with observational data to constrain the coupling parameter .
By analyzing Gaia DR3 data to model the local stellar population around supernova remnant S147, the study identifies a high-mass progenitor range of $21.5M_{\odot}41.1M_{\odot}$ for the supernova, based on the ages of the most luminous nearby stars including the unbound binary companion HD 37424.
Using 3D moving-mesh hydrodynamical simulations with the AREPO code, this study demonstrates that the morphology of ultraluminous X-ray source bubbles is primarily determined by the initial momentum and confinement angle of the outflows, with findings favoring narrow funnel geometries for sources like NGC 55 ULX-1 and NGC 1313 X-2.
This paper proposes and validates a quantized, fine-tuned multimodal large language model for real-time in-orbit gamma-ray burst identification and spectral index estimation on the CXPD CubeSat, achieving perfect classification accuracy and low regression error despite the computational constraints of onboard processing.
This study analyzes multiwavelength variability and spectral energy distributions of BL Lacertae from 2020 to 2024, revealing intraday spectral hysteresis, a significant 370-day radio lag indicating spatially distinct emission regions, and a spectral evolution from intermediate to low synchrotron-peaked states.
This paper presents a new wideband pulsar timing method that rigorously accounts for measurement noise, demonstrating through observations of PSR J21243358 that it yields more realistic uncertainty estimates than existing techniques.
This paper demonstrates that the POLAR-2 mission's High-energy Polarimetry Detector (HPD) will achieve unprecedented time- and energy-resolved linear polarization measurements of prompt gamma-ray bursts, enabling the distinction between competing emission mechanisms and the precise characterization of outflow properties through a novel maximum likelihood fitting technique applied to synthetic sources.
This paper presents a study of cosmic ray composition in the 2–12.5 EeV energy range using muon correlation data from the Yakutsk EAS array (1974–2018), confirming the existence of four distinct groups of primary particles with different origins.
This paper investigates the shadows of rotating traversable wormholes in the Teo class, demonstrating that a variable redshift parameter induces a universal critical value leading to cuspy structures and revealing four distinct shadow morphologies that could serve as observational diagnostics for compact objects.
This paper demonstrates that by accounting for the competitive dynamics of dark matter evaporation and annihilation, solar observations can significantly constrain spin-dependent dark matter-nucleon scattering cross-sections for masses below the traditional 4 GeV evaporation limit, outperforming terrestrial direct detection constraints by up to five orders of magnitude.
This paper extends the Bemfica-Disconzi-Noronha-Kovtun (BDNK) first-order dissipative relativistic hydrodynamics model to include a full first-order charge current with out-of-equilibrium corrections, demonstrating that this inclusion ensures a strongly hyperbolic, causal, and stable system coupled to Einstein's equations without requiring additional frame restrictions.
This paper investigates the full width at half maximum (FWHM) of Type Ia supernova absorption features, revealing that FWHM is primarily determined by rest wavelength, velocity, and temperature, evolves slowly over time, and serves as a robust luminosity estimator—particularly through the A/γ ratio of Si II λ5972—even without phase information.
This paper introduces STRIDE, a novel streaming-based dedispersion algorithm that generates per-pixel time series from interferometric images by partitioning dispersive sweeps across both time and frequency dimensions, thereby drastically reducing memory requirements and enabling efficient transient searches for low-frequency widefield interferometers like the MWA and SKA-Low.
This paper introduces a new local four-velocity gauge-like symmetry for imperfect fluids with vorticity, utilizing a tetrad formulation to construct invariant stress-energy tensors and demonstrating their application in simplifying neutron star models.
The paper proves that for spherically symmetric hairy black holes satisfying the weak energy condition, the ratio of the shadow radius to the horizon radius is bounded from below by $3\sqrt{3}/2$, a limit that is saturated by the Schwarzschild black hole.
This paper investigates how non-Bunch-Davies initial conditions affect the gravitational production of relic particles, demonstrating that while the impact is negligible for conformally coupled fields, it significantly alters the abundance and spectrum of other particles like spin-1 longitudinal modes, thereby allowing for viable dark matter production across a wide range of masses.
This white paper, produced by the EU-funded Cosmic WISPers network, reviews the theoretical motivations and ongoing searches for Weakly Interacting Slim Particles (WISPs) as dark matter candidates, while outlining a strategic roadmap to secure European leadership in this field through diverse and cost-effective experiments over the next decade.
Using IXPE observations of the 2025-2026 outburst, this study reports the discovery of significant, strong energy-dependent X-ray polarization in the black hole binary GS 1354-64 during an intermediate state, revealing a ~4% polarization degree that increases to ~11% at higher energies and providing new insights into the accretion geometry and coronal structure of black hole X-ray binaries.