256 citations · 5.5k across the 143 of their papers we have counts for
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Metallicity of the Massive Protoplanets Around HR 8799 If Formed by Gravitational Instability
R. Helled, P. Bodenheimer
The final composition of giant planets formed as a result of gravitational instability in the disk gas depends on their ability to capture solid material (planetesimals) during the…
Planetary Formation and Evolution Revealed with a Saturn Entry Probe: The Importance of Noble Gases
Jonathan J. Fortney, Kevin Zahnle, Isabelle Baraffe +9
The determination of Saturn's atmospheric noble gas abundances are critical to understanding the formation and evolution of Saturn, and giant planets in general. These measurements…
Jupiter and Saturn Rotation Periods
Ravit Helled, Gerald Schubert, John D. Anderson
Anderson & Schubert (2007, Science,317,1384) proposed that Saturn's rotation period can be ascertained by minimizing the dynamic heights of the 100 mbar isosurface with respect to…
Heavy Element Enrichment of a Jupiter-mass Protoplanet as a Function of Orbital Location
R. Helled, G. Schubert
We calculate heavy element enrichment in a Jupiter-mass protoplanet formed by disk instability at various radial distances from the star, considering different disk masses and surf…