Prépublication
· 2026 arXiv
EN
We report a direct measurement of the 21-cm signal from neutral hydrogen (HI) via the intensity mapping technique at redshift $z = 0.42$ through its power spectrum at cosmological scales $0.095\,h\,{\rm Mpc}^{-1}
MeerKLASS Collaboration, Matilde Barberi-Squarotti et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The finding that galaxies in the first 500Myr were much more numerous and/or brighter than expected is often cited as one of the main discoveries of the James Webb Space Telescope in its first four years of operation. This result is now solidly based on an imp...
A. Fontana, H. Atek et al.
#astro-ph.GA
Prépublication
· 2026 arXiv
EN
Supernovae (SNe) are excellent probes of the physical, chemical, and cosmological context of galaxies across the history of the Universe. The James Webb Space Telescope (JWST ) has a truly unique combination of wavelength, sensitivity, and resolution, providin...
Justin Pierel, David Coulter et al.
#astro-ph.CO
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.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Stellar granulation imprints line-dependent wavelength shifts and profile variations that limit the precision of radial velocity (RV) measurements used for exoplanet detection and characterization. Understanding how the sensitivity of individual spectral lines...
Dušan Vukadinović, Sowmya Krishnamurthy et al.
#astro-ph.SR
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
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We study holographic dark energy models constructed from generalized entropy functionals and local infrared cut-offs. Three entropies (Barrow and the three and five-parameter generalized entropies) are each combined with the Granda-Oliveros (GO) cut-off and tw...
Ke Chen, Simone D'Onofrio et al.
#gr-qc
Prépublication
· 2026 arXiv
EN
METR's 50\% time horizon measures the human completion time of software tasks that an AI solves with 50\% probability, allowing AI capabilities to be expressed in interpretable units. On 228 tasks and 26 AIs, we recompute the time horizons using splines and it...
Drew T. Nguyen, William Fithian
#cs.AI
Prépublication
· 2026 arXiv
EN
In 2026, cybersecurity evaluations involving OpenAI, Anthropic, and Google agents reached real systems outside their authorized test scope. The paths were different. OpenAI agents exploited research infrastructure, coordinated across runs, and compromised part...
Abbas Raftari
#cs.CR
Texte transcrit
· 1740 Wikisource
FR
Extrait : Wikipédia Richard Walter Voyage autour du monde fait dans les années 1740, 1, 2, 3, 4, par George Anson Arkstee & Merkus, 1749. Préface i LIVRE PREMIER
Wikisource
#Voyage
Texte transcrit
· 1832 Wikisource
FR
Extrait : Swift Les Voyages de Gulliver : Voyage à Laputa, etc. Traduction par l’Abbé Desfontaines . Hiard, 1832 (p. 85-91). ◄ Chap. IX. Voyage au pays des
Wikisource
#Voyage
Texte transcrit
· 1771 Wikisource
FR
Extrait : Louis Antoine de Bougainville Voyage autour du monde Saillant & Nyon, libraires, 1771. VOYAGE AUTOUR DU MONDE, PAR LA FRÉGATE DU ROI LA BOUDEUSE, ET LA
Wikisource
#Voyage