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Prépublication · 2026 arXiv EN

The Impact of Galaxy Catalogue Completeness with GLADE+ on Dark Siren Cosmology: A Line-of-Sight Prior Analysis of GWTC-3 Events

Cosmological parameters can be estimated from dark sirens, gravitational waves events without electromagnetic counterpart, by using inference methods which estimate statistically the source redshift from galaxy catalogs. We study the effects of applying differ...

Juan Esteban Rivera, Antonio Enea Romano et al. #astro-ph.CO

Prépublication · 2026 arXiv EN

Detection of escaping magnesium in the upper atmosphere of WASP-76b

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. #astro-ph.EP

Prépublication · 2026 arXiv EN

Polarimetric Behaviour of (3200) Phaethon: New Observations with Implications for Surface Heterogeneity

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. #astro-ph.EP

Prépublication · 2026 arXiv EN

Convergence of Roberts flow dynamos in Eulerian and Lagrangian codes

Standard benchmark tests for numerical magnetohydrodynamics codes focus on one- and two-dimensional problems that ignore the possibility of dynamos, i.e., an exponential instability converting kinetic energy into magnetic energy. They also tend to ignore magne...

Nikyta Shchutskyi, Axel Brandenburg et al. #physics.comp-ph

Prépublication · 2026 arXiv EN

Measuring the Clustering of tSZ-Selected Galaxy Clusters with SPT-3G

We present a measurement of the spatial clustering of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (tSZ) signal. Using a cluster catalog derived from five years of SPT-3G Main field survey data, we define a sample spanning $0.25 < z < 1.1$, as w...

E. S. Martsen, D. Anbajagane et al. #astro-ph.CO