1088 papers
This review traces the evolution of understanding s-process nucleosynthesis in low-mass AGB stars from early nuclear systematics to modern stellar modeling, highlighting how observational constraints necessitated a shift from the high-temperature Ne(,n)Mg neutron source to the low-temperature C(,n)O reaction as the primary mechanism for synthesizing elements between Sr and Pb.
One hundred years after Bernard Lyot's pioneering work, the PICSARR project presents new high-precision polarimetric observations of Venus that confirm historical particle size models while revealing significant short-term variability and distinct ultraviolet polarization anomalies in the polar regions, suggesting lower cloud tops and a larger Rayleigh scattering component compared to equatorial areas.
This study demonstrates that incorporating the comprehensive CRAHCN-O chemical network into photochemical simulations reveals that hydrocarbon photochemical shielding significantly enhances the production of key prebiotic feedstock molecules like HCN in M-star irradiated exoplanet atmospheres compared to simpler networks, highlighting the critical importance of detailed chemical kinetics in modeling prebiotic potential.
This paper reports the discovery of ASASSN-25dc, a candidate period bouncer dwarf nova exhibiting unusual outburst characteristics and a low mass ratio that challenge existing superoutburst models by suggesting an inside-out outburst mechanism in a massive disc lacking the expected 2:1 tidal resonance.
The paper proposes that the most luminous hyper-soft X-ray sources originate from accretion onto a binary black hole within a hierarchical triple system, where a circumbinary disc fed by a high-rate donor explains the observed properties.
This study employs 2D particle-in-cell simulations to demonstrate that continuous compression in magnetically arrested disk plasmas drives pressure anisotropy and triggers kinetic instabilities like the ion cyclotron and mirror modes, which regulate anisotropies and generate nonthermal energy spectra in ways that depend critically on plasma beta, temperature, and compression rates, thereby providing essential constraints for global fluid models of black hole accretion.
This paper proposes that a reaction-diffusion model featuring a moving reaction front driven by protostellar outflows explains the observed evolutionary transition of young stellar disks from structureless Class 0 systems to ring-gap structured Class II systems.
This study utilizes the BEST database to independently validate and re-calibrate the Stetson standard star photometry, correcting significant spatially dependent systematic errors to achieve field-to-field zero-point precisions of 2–4 mmag and sub-10 mmag agreement for individual stars in the BVRI bands.
This paper demonstrates that the hidden symmetry and separability characteristic of Kerr geometry are inevitable local consequences of the Einstein equations for rotating spacetimes, emerging from a rigid projective alignment enforced by mixed field equations under a minimal local equilibrium condition without requiring vacuum, algebraic speciality, or global boundary assumptions.
This paper proposes that long-period transients like GLEAM-X J1627-5235 are isolated, massive, highly magnetized white dwarf pulsars formed via double white dwarf mergers, a model that successfully explains their observed rotational periods and lack of optical counterparts.
This paper addresses the biases in traditional ellipticity measurements of globular clusters by developing and validating a robust method using ground-based and space-based photometry, which reveals that rotation is the primary driver of flattening in ten specific Galactic clusters while also highlighting the roles of velocity anisotropy and tides.
This study utilizes 3D magnetohydrodynamic simulations to demonstrate that the structure and mechanical feedback of massive star cluster winds are determined by the surrounding cavity's density and pressure, enabling a novel, computationally efficient method to model wind termination shocks across different cluster ages and validate them with a semi-analytical approach.
This paper analyzes the eclipsing double low-mass white dwarf system J2102–4145 to demonstrate that its components formed via distinct evolutionary pathways—stable Roche-lobe overflow for the primary and extreme common-envelope mass loss for the secondary—thereby providing a stringent observational constraint on hydrogen-envelope retention and challenging current theoretical models of envelope ejection.
This paper introduces a new discretized grain size evolution model within the FIRE-3 framework that reveals a bimodal dust size distribution and demonstrates how the interplay between dust growth, destruction, and coagulation processes shapes Local Group dust abundances and extinction curve properties, while highlighting the need for alternative mechanisms like top-down PAH formation to explain observed infrared emission features.
This paper presents end-to-end numerical simulations demonstrating that while non-common path aberration compensation significantly reduces residual starlight in the SAXO+ system, a dark hole loop achieves a superior factor of 200 reduction, with the study also establishing that calibrating pyramid optical gains is beneficial for single-loop systems but unnecessary for the dual-loop SAXO+ architecture.
This paper presents a supervised machine learning framework using Extreme Gradient Boosting (XGBoost) to accurately predict the future 3D evolution and collapse of prestellar cores within magnetized molecular clouds by mapping instantaneous gas phase-space states, offering a computationally efficient alternative to traditional sink-particle algorithms.
This paper investigates the nonlinear evolution of the Sun's most prominent high-latitude inertial mode () on a differentially rotating sphere, demonstrating through direct numerical simulations that it undergoes a supercritical Hopf bifurcation where Reynolds stresses smooth the differential rotation to saturate the instability at amplitudes comparable to solar observations.
This study uses thermochemical modeling to demonstrate that dust-depleted inner regions of protoplanetary disks around Herbig stars are molecular-rich environments where dust sublimation significantly enhances SiO abundance, making CO and SiO overtone lines key tracers for understanding terrestrial planet formation.
Using multi-spacecraft observations from Earth's magnetosheath, this study provides the first quantitative evidence that compressible MHD turbulence exhibits a weak-to-strong transition specifically in slow modes, while fast modes remain weakly turbulent, thereby offering a comprehensive characterization of spatiotemporal properties across different turbulence regimes.
This paper analyzes GRB 250129A and concludes that its multiple late-time afterglow rebrightenings are best explained by a sequence of refreshed shocks from delayed relativistic shell collisions, rather than single external-shock evolution or one-time energy injection.