Prépublication
· 2026 arXiv
EN
Planet interior models have revealed that warm Jupiters should harbor large heavy element masses (up to 30-40% of the planetary mass). Within the pebble drift and evaporation scenario, inward drifting pebbles can evaporate and enrich the inner disc with vapor...
Bertram Bitsch
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
If cosmic acceleration is driven by a positive cosmological constant, the universe approaches an eternally accelerating de Sitter state, whose interpretation in quantum gravity remains elusive. We develop a framework in which acceleration is instead a transien...
Gianmassimo Tasinato
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The PLATO mission, planned to launch in spring 2027, will observe a fixed Southern field, LOPS2, for at least 2 years with the goal of discovering and deriving precise parameters for planets as small as Earth around FGK dwarfs and sub-giants. Afterwards, PLATO...
Yoshi Nike Emilia Eschen, Michelle Kunimoto et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Resolving the ambiguity surrounding current Venusian volcanism is a primary objective for upcoming missions like EnVision and VERITAS. This study uses the Venus Planetary Climate Model to simulate the dispersal and detectability of volcanic plumes containing w...
Maureen Cohen, James Holmes et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Tidally-locked planets express a range of climate regimes distinct from those found in our solar system. Their atmospheres are often dominated by planetary-wide overturning circulations and super- rotating jets. In this paper we explore the hydrological cycle...
Daniel A. Williams, Geoffrey K. Vallis et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Saturn's icy moon Enceladus is a prime target in the search for life beyond Earth. Abundant H2 and CH4 in Enceladus's south-polar plume have been shown to be consistent with hydrogenotrophic methanogens feeding on products of long-lived serpentinization. Howev...
Sam Nasreldine, Antonin Affholder et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Redshift space distortions (RSD) provide a powerful measurement of structure formation in modern cosmology. In this work, we explore the potential of 21cm intensity mapping with the MeerKAT Large Area Synoptic Survey (MeerKLASS) to detect RSD and probe gravity...
Daniel Tassie, Steven Cunnington et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We apply a two-layer thermophysical model, with water sublimating from below a dust-crust with dynamically varying depth, to simulate the water outgassing rate, dust-ejections, and non-gravitational forces and torques of comet 67P/Churyumov-Gerasimenko. The du...
Nicholas Attree, Yuri Skorov et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
This study aims to determine asteroid rotation periods from sparse, unevenly sampled, multi-observatory photometry using the Lomb-Scargle (L-S) method. The photometric measurements of the asteroids are taken from the circulars of the Minor Planet Center (MPC)....
Kristers Nagainis, Ilgmars Eglitis
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Space missions such as CoRoT, Kepler, and TESS have transformed asteroseismology and its synergies with exoplanet science. We revisit the nearby K-dwarf HD 219134 to investigate the tension between asteroseismic and interferometric radii, update its fundamenta...
Jérôme Bétrisey, Camilla Pezzotti et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Aims: To analyse the impact of dynamically formed binaries emerging naturally from various star cluster environments on already established planetary systems. Methods: Numerical simulations replicating the star-forming region NGC 1333 are conducted. We conside...
Erwan Hochart, Simon Portegies Zwart
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
It is commonly thought that fast radio bursts (FRBs) trace star formation, and that they are produced by magnetars. Both hypotheses imply that their sources are hosted primarily (but not exclusively) in galactic disks. Although there is evidence in that direct...
Lachlan Marnoch, Stuart D. Ryder et al.
#astro-ph.GA