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As the Worlds Turn: Constraining Spin Evolution in the Planetary-Mass Regime
Marta L. Bryan, Sivan Ginzburg, Eugene Chiang +4
To understand how planetary spin evolves and traces planet formation processes, we measure rotational line broadening in eight planetary-mass objects (PMOs) of various ages (1--800…
Chondrules from high-velocity collisions: thermal histories and the agglomeration problem
Nick Choksi, Eugene Chiang, Harold C. Connolly +2
We assess whether chondrules, once-molten mm-sized spheres filling the oldest meteorites, could have formed from super-km/s collisions between planetesimals in the solar nebula. Hi…
Dynamical Evidence of a Spiral Arm--Driving Planet in the MWC 758 Protoplanetary Disk
Bin Ren, Ruobing Dong, Rob G. van Holstein +22
More than a dozen young stars host spiral arms in their surrounding protoplanetary disks. The excitation mechanisms of such arms are under debate. The two leading hypotheses -- com…
Heavy-metal Jupiters by major mergers: metallicity vs. mass for giant planets
Sivan Ginzburg, Eugene Chiang
Some Jupiter-mass exoplanets contain of metals, well above the typically needed in a solid core to trigger giant planet formation by ru…
Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign
Thomas M. Esposito, Paul Kalas, Michael P. Fitzgerald +62
We report the results of a -year direct imaging survey of 104 stars to resolve and characterize circumstellar debris disks in scattered light as part of the Gemini Planet…
How Consumption and Repulsion Set Planetary Gap Depths and the Final Masses of Gas Giants
Mickey Rosenthal, Eugene Chiang, Sivan Ginzburg +1
Planets open gaps in discs. Gap opening is typically modeled by considering the planetary Lindblad torque which repels disc gas away from the planet's orbit. But gaps also clear be…