Prépublication
· 2026 arXiv
EN
Aims: To analyse the impact of dynamically formed binaries emerging naturally from various star cluster environments on already established planetary systems. Methods: Numerical simulations replicating the star-forming region NGC 1333 are conducted. We conside...
Erwan Hochart, Simon Portegies Zwart
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Prépublication
· 2026 arXiv
EN
Since 2001, we have used the TEXES high resolution mid-infrared spectrograph at NASA's Infrared Telescope Facility to study the density of Io's SO$_{2}$-dominated atmosphere. The spectra cover several SO$_{2}$ absorption lines near 530 cm$^{-1}$ and are used t...
R. S. Giles, J. R. Spencer et al.
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Prépublication
· 2026 arXiv
EN
Climate multistability and tipping points are fundamental properties of planetary climates that depend sensitively on climate feedbacks. We introduce the Geneva Energy Balance Model (Gen-EBM), a new 1-D latitudinal EBM for rapid exploration of terrestrial plan...
Siddharth Bhatnagar, Emeline Bolmont et al.
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Prépublication
· 2026 arXiv
EN
The small satellites of dwarf-planet size worlds in trans-Neptunian space are thought to be produced through giant impacts, and are typically observed to have bright water-ice-dominated surfaces. Here we focus on Quaoar's small primary satellite, Weywot. We bu...
Cameron Collyer, Estela Fernandez-Valenzuela et al.
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Prépublication
· 2026 arXiv
EN
Gravitational microlensing is a unique planet-detection method that does not rely on detecting light from the host star or planet. Instead, planets are discovered when their gravitational field perturbs the light coming from a distant source. The mechanics of...
Aikaterini Vandorou, Stela Ishitani Silva
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Prépublication
· 2026 arXiv
EN
We present an analysis of two planetary microlensing events, KMT-2021-BLG-0247 and MOA-2023-BLG-169, both of which exhibit high magnifications and low planet--host mass ratios, but with markedly different levels of parameter constraint. For KMT-2021-BLG-0247,...
Kansuke Nunota, Andrew Gould et al.
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Prépublication
· 2026 arXiv
EN
Extreme debris disks are signposts of violent rocky collisions, but it remains unclear whether their mid-infrared variability traces transient dust clouds or longer-lived post-impact reservoirs. We analyze a 19 yr mid-infrared record of the young solar analog...
Xiaodian Chen, Shu Wang et al.
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Prépublication
· 2026 arXiv
EN
We report the discovery of PALTA-1 b, a sub-Jupiter mass exoplanet candidate orbiting the nearby early-L dwarf DENIS-P J1253108-570924 (DE1253-57) located at a distance of ~17 pc. The exoplanet was discovered by monitoring the L dwarf's astrometric motion with...
J. Sahlmann, P. F. Lazorenko et al.
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Prépublication
· 2026 arXiv
EN
We report new ALMA Band 7 high-resolution ($\sim$0.05$^{''}$) continuum and $^{12}\text{CO}\ (J=3\text{--}2)$ observations of the disk around the young low-mass star Sz 76. Visibility-plane modeling reveals a previously undetected, faint outer dust ring center...
Giulia Ricciardi, Anna Miotello et al.
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Prépublication
· 2026 arXiv
EN
Identifying the process relevant to planet formation is still a major task. Mechanisms have been identified that can trap dust, preventing it from migrating inwards. A particular hydrodynamic instability, known as the streaming instability, is of high interest...
Dominik Hetzel Ostertag, Mario Flock et al.
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Prépublication
· 2026 arXiv
EN
Near-ultraviolet (NUV) observations can uniquely probe low-density, high-altitude gas in ultra-hot Jupiters (UHJs) via strong resonance lines of metals. WASP-76b is a well-studied UHJ with prior detections of refractory metals and complex day-night chemistry,...
Lakeisha M. Ramos Rosado, Leonardo A. Dos Santos et al.
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Prépublication
· 2026 arXiv
EN
The near-Earth asteroid (3200) Phaethon exhibits unusually high linear polarisation at large phase angles. Previous observations revealed a significant difference between apparitions: measurements obtained in 2016 showed a polarisation up to $\sim10$ percentag...
Zuri Gray, Mikko Vuori et al.
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