112 papers
This paper presents a photodynamical analysis of the TOI-4504 system using new TESS data to reveal that its two giant planets have precessed into a deeply resonant, fully relaxed state with measurable eccentricities, demonstrating a striking dynamical similarity to the GJ 876 system despite their different host star masses.
Using REBOUND simulations, this study identifies two distinct dynamical families of exocomets in the Pictoris system—originating from the inner region via resonance with planet Pic c and from the outer system via chaotic scattering by the gas giants—which explains the observed bimodal radial velocity distribution and suggests differences in their volatile contents.
This paper presents a large-scale analysis of 92 protoplanetary disks using a new ellipse-fitting algorithm on VLT/SPHERE scattered-light images to derive vertical height profiles, revealing that while flared geometries are common, a single power-law model fails to describe the entire sample and significant correlations with system properties are only found in extended disks with radii exceeding 150 au.
This study predicts that the Vera C. Rubin Observatory's LSST will nearly double the current discovery rate of meter-size imminent Earth impactors to approximately 1–2 per year, with a median warning time of about 1.57 days, while also correcting the Northern Hemisphere bias of existing surveys by providing robust detection capabilities in the Southern Hemisphere.
The paper presents the TESS All-Sky Rotation Survey (TARS), a new homogeneous catalog containing rotation periods for 944,056 stars within 500 pc that significantly expands the available data for stellar age and activity studies while introducing methods to correct period aliases and providing open-source tools for further analysis.
This White Paper advocates for a coordinated UK programme integrating high-precision observations, advanced theory, and machine learning to advance Magnetohydrodynamic (MHD) seismology, thereby addressing critical solar physics challenges and enhancing space weather forecasting capabilities.
This paper proposes that the consistent millimeter-scale size of Martian concretions across diverse sites is governed by a universal physical mechanism where the incorporation of ultra-fine atmospheric dust limits growth via diffusion-reaction constraints during single high-obliquity wetting episodes, effectively creating a sedimentary archive of Mars' obliquity history.
This paper outlines the scientific case for using the Pollux spectropolarimeter, a high-resolution instrument with UV-to-NIR polarimetric capabilities proposed for the Habitable Worlds Observatory, to investigate the surface composition, atmospheric emissions, and aerosol properties of Solar System ocean worlds to better understand their internal saline oceans and potential for life.
This white paper proposes applying Assembly Theory to planetary atmospheres as a bio-agnostic, continuous metric of chemical complexity to guide the design and data analysis of the Habitable Worlds Observatory for detecting life beyond known biochemistry.
This paper presents a universal theoretical model that successfully predicts the maximum energy limits of radiation belts across planetary and brown dwarf magnetospheres using only surface magnetic field strength, revealing a 7 TeV asymptotic bound and offering new insights into galactic cosmic ray sources and exoplanet habitability.
This paper introduces TILARA, a novel template-independent, line-by-line algorithm for deriving precise radial velocities that effectively mitigates biases from reference spectra and demonstrates performance comparable to existing methods when applied to ESPRESSO observations of the Sun-like star HD 102365.
This paper presents probabilistic predictions for trans-Neptunian binary mutual events through the 2030s by combining high-precision non-Keplerian orbit solutions with a Bayesian framework to generate observable distributions for five specific systems, thereby facilitating better planning and rapid community response to these rare opportunities.
This study presents the first definitive eight-sigma detection of the C3 molecule in Titan's atmosphere using ultra-high-resolution VLT-ESPRESSO observations, confirming a column density consistent with photochemical models and demonstrating the efficacy of exoplanet research techniques for Solar System targets.
This paper proposes that hydrodynamic outflows driven by hydrogen recombination in the extended proto-lunar disk atmosphere, distinct from Earth's compact carbon-dominated atmosphere, effectively removed volatile elements from the Moon's precursor material, thereby explaining the observed volatile depletion in lunar rocks relative to Earth.
Based on 13 years of HARPS observations, this study reinterprets a long-period signal in the K-dwarf GJ 1137 as evidence of a 5,870-day magnetic activity cycle rather than a Jovian planet, while confirming the system's multiple-planet nature by identifying a new 9.6-day Super-Earth with a minimum mass of 5.12 Earth masses.
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 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 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.
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.