114 papers
This paper reports the discovery and characterization of three new transiting warm Jupiters (TIC 147027702b, TIC 245076932b, and TIC 87422071b) using TESS data and ground-based follow-up observations, providing valuable benchmarks for testing models of giant-planet formation and evolution.
This paper introduces pkdgrav3, a high-performance, fully parallel tree-SPH code optimized for hybrid CPU/GPU architectures that accurately simulates large-scale, self-gravitating hydrodynamic systems such as planetary impacts.
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.
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 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 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.
This study integrates the size-resolved CARMA bin microphysics scheme into the CAM6 global climate model to simulate exoplanets across various rotation rates, revealing that while the native Morrison-Gettelman parameterization yields reasonable habitability assessments, the resolved microphysics significantly alters cloud properties and ice size distributions, which has critical implications for interpreting exoplanet transmission spectra.
Using 13 years of high-resolution SOPHIE spectroscopic data, this study identifies and characterizes distinct long-term magnetic activity cycles of approximately 4.8 and 4.9 years in the exoplanet-hosting M dwarfs GJ 617A and GJ 411, respectively, confirming their magnetic origin and distinguishing them from planetary signals to improve future exoplanet detection efforts.
This study utilizes multi-wavelength thermal imaging to reveal that the archetypal Pictoris debris disk exhibits a vertically thicker mid-infrared structure compared to its millimeter counterpart, a finding that challenges collisional damping models and supports a scenario driven by radiation pressure, random collisions, and secular perturbations from inner giant planets.
This paper presents a multidisciplinary design optimization framework using OpenMDAO and Dymos that simultaneously optimizes low-thrust trajectories and spacecraft power systems for asteroid orbit insertion, explicitly coupling variable-specific impulse Hall thruster performance with time-varying solar power availability to overcome the limitations of traditional simplifying assumptions.
This study demonstrates that late infall onto protoplanetary disks can generate distinct spiral structures observable in scattered light and CO line emission, with gradual gas accretion producing well-defined two-armed spirals and active streamer accretion creating flocculent patterns, while noting that these surface-level perturbations generally do not significantly disrupt the midplane unless the infalling mass rivals the disk mass.
This paper benchmarks pre-main sequence stellar evolutionary tracks by comparing HR diagram-derived masses with dynamical masses from ALMA disk observations of Upper Scorpius stars, finding that models with moderate spot coverage best match the data and that incorporating dynamical mass priors significantly reduces age scatter and improves model consistency.
Using advanced density functional theory and kinetic Monte Carlo simulations, this study reveals that volatile molecules exhibit fundamentally different adsorption behaviors on carbonaceous versus silicate dust grains in protoplanetary disks, with weak physisorption on carbon leading to distinct condensation radii and potential carbon depletion, while strong chemisorption on silicates maintains molecular coatings across most disk regions.
This study demonstrates that radiative-dynamical feedbacks in a dry Martian atmospheric model enable locally released IR-active carbon and metal particles to self-loft and disperse globally, thereby supporting the feasibility of engineered-aerosol warming on Mars despite remaining uncertainties regarding agglomeration and water cycle interactions.
Through the analysis of five stellar occultations observed between 2020 and 2023, researchers determined that the trans-Neptunian object (119951) 2002 KX14 has an elliptical shape with a projected area-equivalent diameter of approximately 389 km and a geometric albedo of 11.9%.
This study characterizes the 2017 Mukundpura CM2 carbonaceous chondrite from Rajasthan, India, using high-resolution microscopy and Raman spectroscopy to confirm the presence of 3–5 nm nanocrystalline diamonds alongside graphitic carbon and abundant iridium, offering insights into stellar evolution and the geological impact anomalies associated with mass extinctions.
This paper introduces and validates "Nemesis," a flexible and scalable multi-scale, multi-physics algorithm built on AMUSE that accurately simulates complex astrophysical systems like star clusters with planetary binaries, matching the precision of direct N-body codes while maintaining computational efficiency through effective time synchronization and parallelization.
This paper presents the first systematic catalogue of simultaneous solar transits of Phobos and Deimos from the Martian surface between 1600 and 2600 CE, identifying 8,565 grazing, 49 partial, and 17 full double transit events that are geometrically constrained to the Martian equator and equinoxes, while providing precise predictions for future occurrences and updated uncertainty estimates pending the JAXA MMX mission.
This paper presents multi-wavelength radio observations of interstellar comet 3I/ATLAS that reveal a high CO/H₂O ratio and demonstrate that sublimation from an extended source within the coma accounts for up to 80% of the observed water production during its pre-perihelion phase.
This study utilizes new spectroscopic observations and excitation modeling to determine that low-velocity exocomets in the Pictoris system transit at significantly larger distances (0.88 to 4.7 au) than previously estimated, revealing that their gaseous tails can expand and remain detectable far from the star.