109 papers
This study quantitatively analyzes asymmetric tidal perturbations on the LARES 2 and LAGEOS satellites by identifying 83 significant Earth tide constituents and demonstrating that the cumulative effect of the remaining minor constituents is non-negligible, thereby providing essential parameters for high-precision orbital dynamics and fundamental physics tests like the Lense-Thirring effect.
This study demonstrates that Pluto significantly influences the long-term stability of Twotinos by trapping them in a 4:3 mean motion resonance, a finding that necessitates including Pluto in simulations of the trans-Neptunian region rather than excluding it.
By coupling cometary impact and planetary atmospheric models, this study demonstrates that while global circulation on tidally-locked exoplanets generally enhances hydrogen escape compared to Earth-analogue atmospheres, the location of an icy comet impact significantly modulates escape rates, with day-side impacts driving an order-of-magnitude higher loss than night-side impacts due to differences in vertical transport efficiency.
N-body simulations demonstrate that Saturn's growth and migration are inefficient at scattering CM-like planetesimals into the Uranus-Neptune region due to gas drag and migration effects, resulting in negligible contamination of the distant CI reservoir and confirming the isolation of carbonaceous asteroid populations.
Using high-resolution simulations, this study reveals that kinetic energy dissipation in subsonic turbulence is vorticity-dominated, localized on small scales, and lags energy injection by approximately 1.64 turnover times, whereas supersonic dissipation is density-correlated, spans multiple scales via shocks and vorticity, and lags by only 0.48 turnover times, with distinct fractal structures identified in both regimes.
Using GPU-accelerated N-body simulations with a new pebble accretion module, the authors demonstrate that wide-orbit giant planets can form from streaming-instability-derived planetesimals regardless of their initial radial distribution, as rapid dynamical scattering and pebble flux filtering drive core growth while naturally producing scattered discs and rare giant impacts within the first 100 Myr.
This paper proposes a UK-led near-infrared Integral Field Spectrograph to complement the US-led optical arm of the Habitable Worlds Observatory, enabling the comprehensive spectral analysis required to detect unambiguous biosignatures on habitable exoplanets.
Using a three-dimensional global climate model, this study reveals that atmospheric collapse on tidally-locked exoplanets can paradoxically sustain dayside surface liquid water by weakening day-night heat transport, thereby preventing the loss of dayside insolation to the nightside despite the reduction in greenhouse warming.
This paper presents the first systematic search for low-mass-ratio planets () in the re-reduced 2023 KMTNet microlensing data, identifying three strong planet candidates including KMT-2023-BLG-0164, whose host system was characterized via spectroscopy despite being projected on a bright foreground star.
By applying modern brown dwarf evolution models that account for cloud formation and deuterium burning, this study reveals that these factors significantly extend the duration planets can remain in the habitable zone and create specific "sweet spots" near the deuterium-burning limit, correcting previous estimates based on simpler analytic approximations.
This paper reports the discovery of two low-mass-ratio microlensing planets and analyzes a "central-resonant" degeneracy in high-magnification events, categorizing it into two distinct types based on mass ratio and source radius to guide future solution identification.
This paper presents new JWST mid-infrared detections of the nearby cold gas giant Ind Ab, combining them with three decades of astrometric data to precisely determine its dynamical mass and construct its first full 4–25 m spectral energy distribution, thereby establishing it as a benchmark system that validates evolutionary models for low-mass, old exoplanets.
New JWST/MIRI observations of the cold super-Jupiter Eps Ind Ab confirm the presence of ammonia while revealing a suppressed feature and fainter-than-expected near-infrared emission, which the authors attribute to the presence of thick water-ice clouds in its atmosphere.
This paper statistically validates the TESS candidate TOI 7475.01 as a hot Jupiter with a 3.25-day period and a radius of approximately 1.18 Jupiter radii, based on a comprehensive photometric analysis that yields a negligible false positive probability.
This paper presents the description and characterization of the FoReRo2 instrument's polarimetric and spectropolarimetric capabilities at the Rozhen Observatory, including a statistical analysis of Serkowski's law parameters, an evaluation of standard star stability, and demonstration of its performance through observations of RS Oph, comet C/2019 Y4, and the symbiotic star Z And.
By analyzing Gaia astrometry in 98 transition disks, this study finds that while companions are detected in 32% of the sample, most are stellar-mass objects that cannot explain the inner dust cavities, suggesting that if companions are responsible for cavity formation, they are likely planetary-mass bodies residing at wider separations.
This paper challenges the conventional view that Pluto-Charon's mutual synchronization resulted from tidal recession, instead proposing a capture scenario where Charon formed at a higher altitude and migrated inward, a process that explains the system's lack of tidal fractures and potential spin reversal while demonstrating that tidal dissipation was significantly lower than in recession models.
This paper presents the first dedicated survey of atmospheric escape from gas giants orbiting F stars using Palomar/WIRC observations, revealing strong and tentative helium detections in several systems and demonstrating that their mass-loss rates are best explained by a combination of Roche filling factor and XUV luminosity rather than NUV-driven models.
This paper introduces an analytical impulse map to model the gravitational dynamics of quasi-hierarchical triple systems with highly eccentric outer orbits, revealing that their inner eccentricity undergoes a random-walk evolution distinct from standard secular mechanisms and significantly altering their gravitational wave coalescence times.
Using high-resolution MMS data from the outer Plasma Sheet Boundary Layer, this study characterizes Kinetic Alfvén Wave turbulence through a steep kinetic-range spectral slope and impulsive parallel electric fields, providing observational evidence for collisionless energy dissipation via direct wave-particle interactions in the magnetotail.