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17 papers · 2 filters
Ejection of rocky and icy material from binary star systems: Implications for the origin and composition of 1I/`Oumuamua
Alan P. Jackson, Daniel Tamayo, Noah Hammond +2
In single star systems like our own Solar system, comets dominate the mass budget of bodies that are ejected into interstellar space, since they form further away and are less tigh…
A Neptune-mass Free-floating Planet Candidate Discovered by Microlensing Surveys
Przemek Mroz, Y. -H. Ryu, J. Skowron +26
Current microlensing surveys are sensitive to free-floating planets down to Earth-mass objects. All published microlensing events attributed to unbound planets were identified base…
OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary
Y. -H. Ryu, J. C. Yee, A. Udalski +106
We report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar, an assignation that can be confirmed by two…
Spin-Orbit Misalignment and Precession in the Kepler-13Ab Planetary System
Miranda K. Herman, Ernst J. W. de Mooij, Chelsea X. Huang +1
Gravity darkening induced by rapid stellar rotation provides us with a unique opportunity to characterize the spin-orbit misalignment of a planetary system through analysis of its…
The Ability of Significant Tidal Stress to Initiate Plate Tectonics
J. J. Zanazzi, Amaury H. M. J. Triaud
Plate tectonics is a geophysical process currently unique to Earth, has an important role in regulating the Earth's climate, and may be better understood by identifying rocky plane…
A recent origin for Saturn's rings from the collisional disruption of an icy moon
John Dubinski
The disruption of an icy moon in a collision with an interloping comet a few hundred million years ago is a simple way to create Saturn's rings. A ring parent moon with a mass comp…