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Prépublication · 2026 arXiv EN

ALMA2040: Submillimeter-wave Limb Sounding of Venus and Mars

Venus and Mars are unique laboratories for understanding the evolution and diversity of terrestrial planets. Despite their broadly similar rocky compositions, their atmospheres, climates, and surface environments have evolved into dramatically different states...

Hideo Sagawa, Arianna Piccialli et al. #astro-ph.IM
Prépublication · 2026 arXiv EN

Properties and limitations of linear models for mutual coupling in 21 cm arrays

Mutual coupling between elements of low-frequency arrays is a leading systematic for 21 cm cosmology, leaking bright foregrounds into otherwise clean regions of the power spectrum. Many mitigation models describe coupling as a linear combination of uncoupled s...

Vincent MacKay, Robert Pascua et al. #astro-ph.IM
Prépublication · 2026 arXiv EN

The gravitational constant and the cosmic microwave background

The CMB constrains the gravitational constant $G$ at recombination to a few percent of its laboratory value, but the effect of $G$ on recombination itself is usually absorbed into a global fit rather than made explicit. We return to the semi-analytic descripti...

Brahim Lamine, Sébastien Beauchamp et al. #astro-ph.CO
Prépublication · 2026 arXiv EN

From Axion Detection to Dark Matter Astronomy

A global haloscope network could turn an axion discovery into astronomy of dark matter substructure and transients. We combine interferometric phase, spatial coherence, and spectroscopy to study the formation and evolution of axion substructure through measure...

Jae Hyeok Chang, Stefano Profumo #hep-ph
Prépublication · 2026 arXiv EN

Chemistry on solar system scales

The initial chemical composition of planets, primitive bodies in our solar system, and exoplanets is ultimately set by their nascent protoplanetary disks. Yet observing key carbon-, oxygen-, and nitrogen-bearing molecules (as well as rarer but important sulphu...

Catherine Walsh, Maria Drozdovskaya et al. #astro-ph.IM
Prépublication · 2026 arXiv EN

Multi-wavelength Polarization as a Probe of Planet Formation

Polarization reveals details of circumstellar disks that are not readily available from total intensity observations. Via multi-wavelength polarimetric observations of disks, we can trace how planets form, how dust grains evolve at the onset of planet formatio...

Ian Stephens, Sarah Sadavoy et al. #astro-ph.IM
Prépublication · 2026 arXiv EN

Time-reversible timestepping in many-body planetary systems

Simulating chaotic planetary system evolution requires resolving small time-scales due to close encounters, scattering, collisions, and more. Simulations typically assign fixed timesteps to all particles, however, which is inefficient and wastes compute resour...

David M. Hernandez, Tenri Jinno et al. #astro-ph.EP