173 papers
This paper introduces a novel physics-informed neural network approach for ground-based solar image reconstruction that simultaneously estimates the atmospheric point spread function and the high-resolution intensity distribution, outperforming state-of-the-art methods in revealing small-scale solar features.
This study demonstrates through numerical simulations that strengthening the Sun's polar magnetic fields significantly alters the background solar wind to create a confining environment that slows the propagation, inhibits the expansion, and delays the arrival of the December 2021 CME at Mars and other spacecraft.
By analyzing 69 globular clusters with a hierarchical framework that explicitly accounts for multiple stellar populations, this study confirms that such complexity has a negligible impact on age estimates, yielding a robust, model-independent age for the Universe of $13.81 \pm 0.32$ Gyr.
By combining Gaia astrometry and Gaia-ESO Survey radial velocities for 430 members, this study determines the 3D rotation of the open cluster NGC 2516, revealing a median rotational velocity of 0.12 km/s at a 74-degree angle to the galactic plane that contradicts expected dependencies on cluster age and mass.
Using Strömgren photometry and stellar age-dating algorithms, this study reveals that the R127 and R128 clusters in the Large Magellanic Cloud exhibit an anomalous scarcity of bright blue stars compared to single-star evolutionary models, suggesting that the peculiar nature of the luminous blue variable R127 may stem from binary evolution, rapid rotation, or observational incompleteness rather than standard single-star evolution.
This study presents the first systematic comparison of seven hydrodynamic codes simulating the unstratified streaming instability, revealing broad qualitative agreement across methods while identifying dust modeling choices and resolution as key factors influencing quantitative density statistics and highlighting the superior energy efficiency and scalability of GPU-based implementations.
This study demonstrates that initializing MHD flare simulations with non-force-free extrapolations, which account for plasma pressure and gravity, yields significantly higher magnetic energy release and more realistic synthetic emissions compared to traditional non-linear force-free field models, thereby highlighting the critical impact of initial magnetic assumptions on flare dynamics and observables.
This study analyzes 68 unequal-mass eclipsing binaries from the EBLM survey to demonstrate that tidal synchronization and circularization are highly efficient for orbital periods under 3 days, while the persistence of asynchronous systems in longer-period binaries suggests limitations in current tidal theories.
This study demonstrates through end-to-end simulations that NASA's Pandora SmallSat Mission can effectively correct stellar photospheric contamination in exoplanet transmission spectroscopy by inferring stellar activity parameters from contemporaneous visible and NIR observations, reducing contamination signals to negligible levels for simple spot distributions while identifying cases with complex geometries that require additional constraints.
This study presents low-resolution spectroscopic measurements of systemic velocities and metallicities for five poorly known Galactic clusters, revealing that Pfleiderer 2 is likely an in-situ Milky Way object, RLGC2 and Koposov 1 are associated with the Gaia-Sausage-Enceladus and Sagittarius dwarf spheroidal accretion events respectively, while Koposov 2 and Muñoz 1 show ambiguous or tentative origins.
This paper evaluates the anticipated performance of NASA's Pandora SmallSat mission, demonstrating through simulated modeling that it can constrain atmospheric abundances for a diverse range of exoplanets and significantly enhance the reliability of atmospheric characterization when used in synergy with the James Webb Space Telescope.
By combining EOVSA microwave imaging spectroscopy with stereoscopic X-ray observations from Hinode and Solar Orbiter, this study reconstructs three-dimensional maps of magnetic field strength and plasma parameters in the SOL2021-05-07 flare, revealing a magnetically dominated environment that provides critical constraints for models of magnetic reconnection and flare dynamics.
This paper outlines the ten science themes, observational strategies, and target selection defined by the Mauve science collaboration for the first year of operations of the low-cost Blue Skies Space Ltd. satellite, which utilizes a 13 cm telescope and UV-Vis spectrometer to fill gaps in galactic ultraviolet data following its November 2025 launch.
Despite a technical malfunction limiting initial observations, analysis of Fermi LAT data and associated solar phenomena indicates that Solar Cycle 25 is stronger than Solar Cycle 24, with an estimated total of approximately 43 to 50 sustained gamma-ray emission events.
This study utilizes Gaia DR3 astrometry and APOGEE metallicities to construct a comprehensive membership catalog of the Sagittarius dwarf spheroidal galaxy core and Messier 54, revealing a precise 2% distance measurement that confirms their spatial co-location and provides evidence for an infall scenario.
JWST NIRSpec observations of the warm super-Earth GJ 486b reveal a transmission spectrum that is either indicative of a water-rich atmosphere or contaminated by stellar activity, a degeneracy that requires shorter-wavelength data to resolve.
This paper presents a novel method for generating synthetic disk-integrated stellar absorption lines that isolate granulation effects, revealing that while line-shape diagnostics can theoretically trace convective blueshifts, their practical utility is severely limited by photon noise, thereby highlighting the need for more robust metrics and establishing a valuable testbed for high-precision radial velocity studies.
This paper presents a new, computer-simulation-based grid of Stark-broadened profiles for 13 neutral helium lines across relevant astrophysical conditions, aiming to correct previous semi-analytical models and improve the determination of physical parameters for helium-rich stars and white dwarfs.
Despite searching for methanol in the water-rich protoplanetary disk around HL Tau using ALMA archival data, the study found no emission and derived stringent upper limits on its abundance, suggesting that optically thick dust obscures the signal or that the disk's chemical evolution differs significantly from other young stellar objects and comets.
This paper introduces a novel community detection framework that models solar vortices as an interacting network, revealing that vortices identified as hubs, connectors, or peripherals within these communities exhibit greater persistence, height, and collective helical motion, thereby offering new insights into how collective vortex dynamics drive energy transfer and wave excitation in the upper solar atmosphere.