114 papers
This study uses 1D simulations to demonstrate that while MHD-driven discs experience less photoevaporative erosion due to limited radial spreading, their overall lifetimes are comparable to viscous discs, with the survival of dust crucial for planet formation ultimately determined by the interplay between radial spreading, inward drift, and external FUV erosion strength.
By re-examining 1,405 exoplanets orbiting 1,221 stars with high-precision parameters from SWEET-Cat, this study confirms the existence of the radius valley and reveals its dependence on period, flux, stellar mass, and age, providing evidence that supports a core-powered atmospheric mass loss scenario while highlighting the need for improved stellar characterizations in future missions like PLATO.
Using three-dimensional hydrodynamical simulations, this study reveals that the thermal balance between heating and cooling in disk-embedded planets creates three distinct envelope regimes, where intermediate cooling rates form a radiative layer that traps volatiles while slow cooling in inner disks leads to fully convective envelopes that stall super-Earth growth and deplete volatiles.
Using 3D radiative magnetohydrodynamic simulations of collapsing cores, this study demonstrates that anisotropic, streamer-fed accretion driven by magnetic fields and turbulence not only facilitates rapid disk spreading but also continuously generates and sustains significant eccentricity () in Class 0 protoplanetary disks, with profound implications for planet formation and cosmochemistry.
This paper proposes and validates a double-aperture photometry strategy as a computationally efficient alternative to on-board centroid shifts for detecting false positives in the PLATO mission, demonstrating that secondary flux measurements achieve the highest detection efficiency (92%) for rejecting eclipsing binary contaminants among Sun-like stars.
By combining cold plasma experiments and photochemical modeling on H2-rich gas mixtures, this study demonstrates that out-of-equilibrium chemistry in temperate exoplanet atmospheres drives the formation of diverse organic species, with production efficiency and chemical complexity heavily dependent on the C/O ratio and the balance between methane and oxidized carbon sources.
Using high-precision radial velocities from HARPS-N combined with Gaia DR3 astrometry, the GAPS programme confirmed that the companion HD 128717 B (Gaia-6 B) is a long-period, high-eccentricity brown dwarf with a mass of approximately 20 Jupiter masses, correcting a previously inaccurate orbital solution derived solely from Gaia data.
This paper proposes a deep neural network-based method that overcomes the limitations of conventional techniques by achieving both high computational efficiency and identification precision (97.26–99.91%) for weak stability boundary structures, thereby facilitating their application in ballistic capture analysis and low-energy transfer construction.
Using ALMA observations of interstellar comet 3I/ATLAS, researchers detected distinct outgassing behaviors between methanol and hydrogen cyanide, revealing a remarkably high CHOH/HCN production rate ratio that ranks among the highest ever measured in comets and is surpassed only by the anomalous C/2016 R2.
This study demonstrates that the mass of a central supermassive black hole and a planet's distance from the galactic center critically determine exoplanet habitability by driving atmospheric heating, mass loss, and severe ozone depletion, particularly through energy-driven winds from active galactic nuclei.
Using ALMA observations at a heliocentric distance of 2.1 au, this study characterizes the molecular composition and dust properties of comet C/2017 K2 (PanSTARRS) as it enters the water sublimation zone, revealing distinct production mechanisms for various volatiles and establishing an upper limit of 6.6 km for the nucleus diameter.
By using CRIRES+ near-infrared spectroscopy to detect strong CO absorption but no H in the edge-on debris disks of HD 110058 and HD 131488, the study establishes high CO/H ratios that rule out a primordial origin and strongly support an exocometary source for the gas.
By analyzing a comprehensive dataset of 391 transit light curves, this study confirms the rapid orbital decay of the hot Jupiter WASP-12 b with a decay rate of , supporting this mechanism as the primary cause of its observed timing deviations while also deriving a planetary Love number consistent with Jupiter's internal structure.
This paper introduces the concept of the Energy Transition Domain (ETD) based on mechanical energy within the Earth-Moon planar circular restricted three-body problem and utilizes it to develop an effective method for constructing gravity-assist escape trajectories from low Earth and geosynchronous orbits.