6 papers
Rattling Resonant Chains with Dynamical Tides and Parametric Resonance Passage
Mohammad Farhat, Eugene Chiang
Close-in sub-Neptunes are born in mean-motion resonant chains that break apart on a timescale of 100 Myr. If the chains are first ''rattled'' --- have their free eccentriciti…
Magma Ocean Waves and Thermal Variability on Lava Worlds
Mohammad Farhat, Eugene Chiang
Lava worlds are rocky planets with dayside skins made molten by stellar irradiation. Tidal heating on these shortest-period planets is more than skin deep. We show how orbital ecce…
Eccentric Disks With Self-Gravity
Yoram Lithwick, Eugene Chiang, Leon Mikulinsky +1
Can a disk orbiting a central body be eccentric, when the disk feels its own self-gravity and is pressureless? Contradictory answers appear in the literature. We show that such a d…
Seismic Oscillations Excited by Giant Impacts in Directly-Imaged Giant Planets
J. J. Zanazzi, Eugene Chiang, Yifan Zhou
The radii and masses of many giant exoplanets imply their interiors each contain more than 100 of solids. A large metal content may arise when a giant planet grows…
Spin and Obliquity Evolution of Hot Jupiter Hosts from Resonance Locks
J. J. Zanazzi, Eugene Chiang
When a hot Jupiter orbits a star whose effective temperature exceeds 6100 K, its orbit normal tends to be misaligned with the stellar spin axis. Cooler stars typically have s…
Damping Obliquities of Hot Jupiter Hosts by Resonance Locking
J. J. Zanazzi, Janosz Dewberry, Eugene Chiang
When orbiting hotter stars, hot Jupiters are often highly inclined relative to their host star equator planes. By contrast, hot Jupiters orbiting cooler stars are more aligned. Pri…