Prépublication
· 2026 arXiv
EN
Context. The DART impact might have substantially modified the surface and near-surface structure of Dimorphos, affecting the morphology and gravity field that is to be measured by ESA's Hera mission. Aims. We investigate the post-impact redistribution of ejec...
S. D. Raducan, Ö. Karatekin et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
An enhancement of the primordial curvature power spectrum on small scales can give rise to two populations of compact objects: primordial black holes (PBHs), which form during radiation domination, and dark matter minihalos, including ultracompact minihalos (U...
B. A. Rudenko
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The problem of predicting when a multi-planet system will become dynamically unstable has defied analytical progress over the past three hundred years. Recent machine learning advances achieve high predictive performance of instability dynamics, but as black-b...
Simon Alford, Edward Gu et al.
#cs.LG
Prépublication
· 2026 arXiv
EN
The diversity of planetary orbital architectures calls for observational constraints on radial variations in disk-plane orientation, or warps, yet such variations in dust disks remain poorly characterized. CQ Tau is a promising target because its misaligned in...
Shu Ishibashi, Masayuki Yamaguchi et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Context. Gamma-ray bursts (GRBs) extend cosmological distance measurements beyond the range densely sampled by Type Ia supernovae, but their standardization requires reliable calibration and uncertainty estimates. Aims. We calibrate the Amati correlation witho...
P. Caterino, M. Demianski et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The knowledge of Titan's near-surface atmosphere is sparse. The Huygens descent probe measured winds, and the multiple dune field observations and possible dust storms suggest active near-surface dynamics. The Dragonfly rotorcraft lander will fly close to the...
Maxence Lefèvre, Léa E. Bonnefoy et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We investigate the three-dimensional (3D) stellar mass profiles of galaxy clusters using simulations and observations. We develop the Projection-to-Enclosed Estimator by Layers (PEEL) model, which geometrically reconstructs the 3D stellar mass profile from the...
Jong-In Park, Jubee Sohn et al.
#astro-ph.GA
Prépublication
· 2026 arXiv
EN
We measure the dipole in the count of radio galaxies over the sky as seen by the Australian SKA Pathfinder (ASKAP) in the Rapid ASKAP Continuum Survey (RACS). Our analysis focuses on the third observational epoch in the 'low' passband (943.5 MHz; RACS-low3) an...
Oliver T. Oayda, Mali Land-Strykowski et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We explore effective field theory (EFT) realizations of the dark dimension (DD) scenario in which the size of the DD is determined by the competition between a 5D quintessence potential and the Casimir energy. When only contributions from massless fields are c...
Rashmikanta Mantry, Kazuyuki Furuuchi
#hep-th
Prépublication
· 2026 arXiv
EN
Cosmic voids provide a setting for examining the interplay between mass and environment in shaping galaxy and halo properties. Using the SDSS DR7 volume-limited galaxy sample and the ELUCID constrained simulation of the local large-scale structure, we investig...
Youcai Zhang
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Detection of the redshifted 21-cm signal from neutral hydrogen requires precise control of systematic effects arising from instrumental calibration. In this work, we investigate the impact of both time- and frequency-dependent residual gain and bandpass errors...
Saikat Gayen, Suvam Tripathy et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
In the outer regions of protoplanetary disks, dust grains are often mantled with a layer of ice containing simple molecules. The irradiation of the disk by far-ultraviolet (FUV) photons breaks such molecules, producing photoproducts (radicals, ions, and interm...
Ivan Judah Manoraj, Satoshi Okuzumi et al.
#astro-ph.EP