4 papers
Early evidence for isotropic planetary obliquities in young super-Jupiter systems
Michael Poon, Marta L. Bryan, Hanno Rein +3
This decade has seen the first measurements of extrasolar planetary obliquities, characterizing how an exoplanet's spin axis is oriented relative to its orbital axis. These measure…
Origins of Mercury's Big Heart of Iron: Exploring Pathways to Form High Core Mass Fraction (CMF) Planets via N-body Simulations
Haniyeh Tajer, Ji Wang, Anna C. Childs +3
Mercury's core mass fraction (CMF) is ~0.7, more than double that of the other rocky planets in the solar system, which have CMFs of ~0.3. The origin of Mercury's large, iron-rich…
A potential exomoon from the predicted planet obliquity of Pictoris b
Michael Poon, Hanno Rein, Dang Pham
Planet obliquity is the alignment or misalignment of a planet spin axis relative to its orbit normal. In a multiplanet system, this obliquity is a valuable signature of planet form…
Leaning Sideways: VHS 1256-1257 b is a Super-Jupiter with a Uranus-like Obliquity
Michael Poon, Marta L. Bryan, Hanno Rein +4
We constrain the angular momentum architecture of VHS J125601.92-125723.9, a 140 20 Myr old hierarchical triple system composed of a low-mass binary and a widely-separated pl…