Author

R. Helled

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Preprint Sep 2026

Beyond Pebble Isolation: Diverse Pathways to Giant Planet Formation Across Stellar and Orbital Scales

Context. Giant planet formation requires reaching crossover mass, i.e., when the mass of the gaseous envelope becomes equal to the mass of the core, within the disc's lifetime. The formation process depends critically on the orbital distance and stellar mass. Aims. We simulate planet formation via pebble accretion up t...

Lorenzo Peerani, S. Shibata, R. Helled · 0 citations

Review Aug 2026

The MegaWave Radio Surveyor

Several Decadal-level questions in astrophysics, exoplanets, astrobiology, and cosmology can be addressed only at low radio frequencies inaccessible from Earth. The MegaWave Radio Surveyor would open this largely-unexplored region of the electromagnetic spectrum with a space-based interferometer to (1)~Track the space...

T. W. Lazio, E. Shkolnik, J. Aguirre et al. · 0 citations

Open access Sep 2026

JWST/MIRI Imaging Search for Kinematically Detected Protoplanetary Candidates

Kinematic perturbations observed with the Atacama Large Millimeter/submillimeter Array in CO line emission provide evidence for a population of embedded giant protoplanets shaping the structure of protoplanetary disks. We present JWST/MIRI F1140C (λ = 11.3 μm) coronagraphic observations of five protoplanetary disks—HD...

G. Cugno, M. Benisty, R. Teague et al. · Astronomical Journal · 0 citations