Prépublication
· 2026 arXiv
EN
Titan's equatorial superrotation is associated with climatological retrograde (westward) near-surface winds at low latitudes, as consistently simulated by Titan general circulation models. However, the Huygens probe measured prograde (eastward) near-surface wi...
Sooman Han, Scot Rafkin et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Bright standard sirens from the Einstein Telescope (ET) provide an independent probe of cosmic expansion. In this article, we test whether future ET observations can constrain a dynamical dark-energy scenario inspired by DESI DR2. Using the best-fitting 29-bin...
Yuanmin Mao, Wen Zhao
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Primordial tensor non-Gaussianity can probe massive particles present during inflation. We investigate this possibility in an effective field theory where the massless graviton mixes with the helicity-two mode of an additional massive spin-two field $σ_{ij}$ w...
Sukannya Bhattacharya, Matteo Fasiello et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Contact binaries, appearing as two objects stuck together, are prevalent throughout the Solar System, making up between 30- 50% of asteroids and comets. Despite this, detailed shape models of contact binaries are hard to obtain remotely, requiring rare occulta...
Richard E. Cannon, Agata Rożek et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
The recent measurement of baryon acoustic oscillations by the Dark Energy Spectroscopic Instrument reveals a mild tension with observations of the cosmic microwave background (CMB) within the standard $Λ$CDM cosmological model. Another interesting hint beyond...
Salvatore Samuele Sirletti, Toshiya Namikawa et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We report the discovery and characterization of a planetary system in the microlensing event OGLE-2013-BLG-1125/MOA-2013-BLG-584. We analyze photometric data from OGLE and MOA surveys, as well as LCO, $μ$FUN, and Mindstep follow-up telescopes to model the micr...
E. Bachelet, M. Hundertmark et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We use the monopole and quadrupole power spectra of [\ion{O}{2}]-emitting galaxies in the HETDEX Public Data Release 1 to constrain the growth of cosmic structures at $z\le0.48$. We interpret the power spectra using a simulation-based model built from the Much...
Jeongin Moon, Eiichiro Komatsu et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We study the cosmology of self-interacting ultralight dark matter. The scalar field evolves from an early Hubble-frozen phase to a quartic-dominated radiation-like phase and finally to a quadratic matter-like phase. The intermediate phase increases the pre-rec...
Seokcheon Lee, Jae-Weon Lee
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Axion-like particles are light pseudoscalars that appear in many extensions of the Standard Model and are candidates for dark matter. Through their mixing with photons, they imprint energy dependent modulations on the spectra of astrophysical sources shining t...
Oleksandr Khasai, Lidiia Zadorozhna et al.
#astro-ph.HE
Prépublication
· 2026 arXiv
EN
Reinforcement learning (RL) is an effective way to strengthen the long-context reasoning of large language models (LLMs), but it needs training data that are long, diverse, challenging, and verifiable. Human annotation of such data is expensive, naturally occu...
Zhennan Wan, Jianfei Chen
#cs.CL
Prépublication
· 2026 arXiv
EN
Existing sequential recommenders usually allocate a fixed computational budget to every item in a user's interaction history, regardless of the item's contribution to the final prediction. We challenge this de facto design with two diagnostic findings. (1) Non...
Zhanshuo Cao, Jiakai Tang et al.
#cs.IR
Prépublication
· 2026 arXiv
EN
Existing world models typically perceive a scene through current visual frame or a narrow history window. However, these observations may not reveal the physics properties that determine transition dynamics, such as an object's mass distribution, joint damping...
Yunhao Luo, Wentao He et al.
#cs.RO