1092 papers
This paper presents a robust compressible APIC/FLIP method that combines conservative split resampling and adaptive APIC/PIC blending to eliminate particle depletion artifacts in long-time Richtmyer-Meshkov instability simulations while preserving vortex dynamics and matching reference Euler growth metrics.
This study reveals that minor mergers, supermassive black hole growth, and gas accretion-starvation balance are the primary drivers of scatter in the stellar mass-gas metallicity relation across cosmic environments, with their specific impacts varying significantly by redshift and environment, particularly showing dominant effects in galaxy nodes.
High-cadence TESS observations of the high-redshift quasar PKS 0805−07 reveal a statistically significant, transient optical quasi-periodic oscillation with a period of approximately 1.7 days, which is interpreted as likely arising from either a hotspot orbiting a supermassive black hole or magnetohydrodynamic instabilities within the relativistic jet.
Based on multifrequency radio and X-ray observations indicating a strong magnetic field and low plasma beta, this paper proposes that the accretion flow onto Sgr A* transitions from a convection-dominated regime at large scales to a supersonic wind above a small accretion disk near the event horizon.
This paper proposes and observationally constrains a novel "structure-induced" dark energy model, which links cosmic structure formation to dark energy evolution, demonstrating its viability as a solution to fine-tuning and coincidence problems while offering flexibility in addressing current cosmic tensions.
This paper introduces the galmex Python package to generate a comprehensive catalog of non-parametric morphological indices for DECaLS galaxies, demonstrating their effectiveness—particularly when combined with LightGBM machine learning—in reliably classifying spiral and elliptical galaxies for future southern hemisphere surveys.
This paper outlines the scientific objectives and observational methodology of the OPTIMus survey, which utilizes multi-wavelength data from optical, infrared, and millimeter telescopes to comprehensively characterize the complex interstellar medium surrounding young massive stars.
Using the largest sample to date from the MaNGA survey, this study identifies 147 galaxies with counter-rotating stellar disks, classifies them into distinct kinematic types to reveal their origins in gas accretion and evolutionary stages, and demonstrates that the impact of this accretion on galaxy evolution depends primarily on the abundance of pre-existing gas in their progenitors.
This paper introduces a novel modified-gradient (MG) method that employs an implicit projection to reformulate magnetic field gradients, thereby achieving exact divergence-free results with round-off precision in meshless magnetohydrodynamics and demonstrating superior performance over constrained-gradient techniques and the GIZMO code across various test cases.
This paper challenges the prevailing view that Saturn's rings are young by demonstrating that revised calculations of gravitational focusing and the inclusion of space weathering processes significantly extend the estimated exposure age to several billion years, thereby undermining the dust pollution argument as a definitive proof of the rings' youth.
Using Australia Telescope Compact Array observations across 1.1–3.1 GHz, this study characterizes the radio spectrum and magnetic field properties of supernova remnant G315.42.3, revealing a dominant turbulent magnetic field and uniform radio characteristics across regions with differing evolutionary stages to inform future SNR modeling.
By analyzing 28 sharp-polarity-inversion-line delta sunspots, this study finds that only one originated from a single emerging writhe-kinked flux rope while the others formed through the merging of multiple magnetic regions, leading to the conclusion that such flux ropes are rarely the primary cause of these sunspots and that their genesis typically involves packing opposite-polarity flux via convection downflows.
This study demonstrates that the single-fluid magnetohydrodynamic approximation is a highly accurate and practical tool for modeling Alfvén wave propagation and energy transport in the partially ionized lower solar atmosphere, as it yields results nearly identical to more complex multi-fluid models despite minor discrepancies in high-frequency reflectivity and localized heating rates.
This paper investigates non-minimally coupled scalar field inflation within Loop Quantum Cosmology with inverse-volume corrections, demonstrating that the model's predictions for inflationary observables align with current observational data while the non-minimal coupling significantly enhances the probability of achieving sufficient inflation by enlarging the favorable phase-space volume.
This paper defends the excursion-set formalism for deriving primordial black hole mass distributions by demonstrating that noise is strictly white when sampling on a synchronous surface and that cloud-in-cloud effects remain crucial for broad power spectra, thereby establishing the necessity of solving the first-passage-time problem with a moving barrier.
This paper presents a global high-resolution hydrological model that dynamically simulates the formation, merging, and redistribution of surface liquid reservoirs on Mars across varying water inventories and evaporation rates, revealing a transition toward a contiguous northern ocean at low water levels and concentrated accumulation in major basins at higher levels.
This study presents the first spatially resolved metallicity analysis of the nearby Seyfert 2 galaxy Mrk 573 at pc scales, revealing patchy oxygen enrichment in AGN-dominated regions that correlates with radio jet emission and suggests metals are transported from the nucleus by AGN-driven outflows rather than star formation.
Two-dimensional particle-in-cell simulations reveal that magnetic reconnection generates strong out-of-plane magnetic fields within flux ropes through distinct mechanisms—specifically the Weibel instability driven by electron temperature anisotropy in the absence of a guide field and separatrix currents reinforced by the Kelvin-Helmholtz instability in its presence—which subsequently scatter electrons and influence heating processes.
This study analyzes six years of cosmic muon rate data from a high-latitude station in Svalbard, revealing that seasonal atmospheric temperature variations drive a pronounced annual modulation and demonstrating the effectiveness of tailored temperature correction techniques compared to lower-latitude measurements.
This paper demonstrates that wave-optics effects induced by cold dark matter subhalos in the mass range of $10^410^7\,M_{\odot}$ produce detectable, percent-level frequency-dependent amplitude and phase distortions in strongly lensed gravitational waves within the LISA band, offering a novel probe of subgalactic dark matter structure inaccessible to electromagnetic observations.