173 papers
The paper reports the discovery of Gaia-GIC-1, a young F-type star exhibiting high-amplitude optical dimming and sustained infrared brightening caused by a massive, hot dust cloud resulting from a catastrophic planetary collision, offering a unique opportunity to study terrestrial planet formation.
This paper presents a comprehensive catalogue and statistical analysis of greater than 100 MeV solar proton events from May 1996 to August 2024, derived from SOHO-ERNE observations and cross-calibrated with multi-instrument data to establish a unified framework for understanding high-energy particle acceleration across solar cycles 23–25.
Using Gaia DR3 astrometry, this study reveals that the kinematic properties of LMC Wolf-Rayet stars vary significantly by subtype, with very massive and lower-luminosity stars likely dominated by dynamical ejections, while binary WC stars and WNE stars suggest distinct formation mechanisms involving mass transfer and explosive mergers, respectively.
Using high-cadence Hinode EIS observations of an M-class solar flare, this study reveals that spatial variations in plasma composition, specifically a higher FIP bias at the loop apex compared to the footpoint, correlate with faster radiative cooling rates, a finding supported by EBTEL hydrodynamic simulations.
This paper proposes a novel data-driven approach that embeds neural networks into solar dynamo equations to learn the functional form of alpha-quenching from sunspot data, revealing a strong correlation between the dynamo number and the quenching shape that highlights the need for additional constraints to uniquely determine model parameters.
By applying the FIRTEZ inversion code with non-LTE and 3D magneto-hydrostatic equilibrium to high-resolution CRISP spectropolarimetric data, this study maps the thermal, magnetic, and kinematic properties of a sunspot to reveal a reversal of the photospheric Evershed flow into an inflow, distinguish the persistent outflow of the surrounding moat, and confirm that umbral flashes are driven by supersonic converging flows forming shock fronts.
This study investigates a blowout jet-like prominence eruption from October 6, 2023, characterizing its multi-stage kinematics, untwisting Alfvénic transverse oscillations, spectroscopic properties, and associated C-class flares and CME.
This study identifies and characterizes nearly two dozen candidate Luminous Blue Variables in the galaxies M31 and M33, confirming one as a definitive LBV and designating four as high-probability candidates based on multi-epoch spectroscopy, SED fitting, and evolutionary track analysis, thereby significantly expanding the known population of these massive stars in the Local Group.
This study utilizes LAMOST Data Release 11 cross-correlated with multiple optical and infrared surveys to identify 139 white dwarf candidates exhibiting infrared excess, comprising potential companions like M dwarfs and brown dwarfs as well as debris disks, while emphasizing the need for high-resolution follow-up observations to confirm these findings.
This paper introduces a new 3D dynamical model, SOCOL:14C-Ex, to analyze the atmospheric production and transport of radiocarbon during extreme solar particle events, enabling the precise characterization and strength assessment of seven major Miyake events over the past 14,000 years, with the 12351 BC event identified as the strongest overall and the AD 774 event as the strongest of the Holocene.
Using high-resolution Solar Orbiter observations, this study details the fine dynamics of over 22 recurrent coronal jets driven by persistent interactions between rising loops/mini-filaments and a fan-spine-like structure, revealing specific mechanisms such as partial eruptions, current sheet formation, and blob propagation.
This paper presents a systematic transit survey of 121 newly accessible mid-to-late M-dwarfs using TESS Cycle 6+ data, which identified 20 transit-like signals across 16 systems and established a robust reliability framework to prioritize two high-confidence candidates for radial velocity follow-up while flagging others for further observation.
This paper presents a project establishing thirty-two faint, all-sky DA white dwarfs as spectrophotometric standard stars with sub-percent uncertainties by validating fully radiative pure hydrogen models against observations, thereby providing an unprecedented ensemble of standards for large telescopes and surveys that complements the existing CALSPEC scale.
This "unreview" paper shifts focus from established knowledge to critical unresolved questions regarding accretion physics in white dwarfs—such as viscosity, wind launching, and precession—to motivate future research that will advance understanding across all mass scales.
This paper investigates how the neutron star equation of state and magnetar mass influence the ejecta properties and light curves of "novae breves"—short-lived optical transients from magnetar giant flares—demonstrating that these features are detectable with current and future facilities, thereby offering a promising method to probe neutron star crusts.
This study presents the first comprehensive kinematic analysis of Galactic star clusters, revealing that rotation is imprinted during early formation and subsequently eroded by dynamical evolution, with a higher prevalence of rotating systems in young clusters and a tendency for older clusters to align their internal rotation with their orbital motion.
This paper argues that a persistent, cycle-invariant discrepancy between radio brightness temperatures and hydrostatic scale-height modeling in the quiet solar corona provides evidence for non-Maxwellian, kappa-distributed electron velocity distributions with kappa values of approximately 2–3, rather than the turbulent scattering or standard thermal equilibrium models previously assumed.
This paper extends the macroscopic effective-surface model of neutron stars to rotating systems by deriving analytical expressions for angular momentum and adiabatic moments of inertia within General Relativity, revealing that strong gravity and surface correlations significantly constrain the accessible neutron star radii.
This study employs chemical kinetics models to demonstrate that an enhanced carbon-to-oxygen (C/O) ratio is necessary to explain the observed hydrocarbon-rich chemistry in the inner disks of very low-mass stars, although a degeneracy between the C/O ratio and stellar X-ray luminosity remains.
This paper analytically derives and models the maximum offset of binary neutron star mergers from their host galaxies, finding it scales inversely with the seventh power of the host's escape velocity to aid in identifying hosts for non-coincident merger events.