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27 papers · 1 filter
Exploring the conditions for forming planetesimals by the streaming instability and planetary systems by pebble accretion
Anders Johansen, Wladimir Lyra
The streaming instability and pebble accretion are two physical mechanisms with demonstrated potentials to drive, respectively, the formation of planetesimals and the growth of pla…
A distant brown dwarf coplanar to a warm Jupiter and a hot super-Earth
Matías I. Jones, Luca Naponiello, Trifon Trifonov +21
In transiting planetary systems, in which planetary sizes are accurately determined from transit observations, the presence of transit-timing variations (TTVs), especially when com…
Excitation and Damping of Oscillation Modes in Gaseous Planets
Jim Fuller, Marzia Parisi, Steve Markham +2
The excitation and damping mechanisms for oscillation modes of gas giant planets are undetermined. We show that differential rotation may greatly enhance convective viscosity in gi…
New Orbital Constraints for YSES 1 b and HR 2562 B from High-Precision Astrometry and Planetary Radial Velocities
Jonathan Roberts, William Thompson, Jason J. Wang +20
We present new VLTI/GRAVITY astrometry and updated orbit fits for the directly imaged companions YSES 1 b and HR 2562 B, substellar objects straddling the planet-brown dwarf bounda…
Are NH and CO ice present on Miranda?
Riley A. DeColibus, Nancy J. Chanover, Richard J. Cartwright
Published near-infrared spectra of the four largest classical Uranian satellites display the presence of discrete deposits of CO ice, along with subtle absorption features arou…
Direct imaging discovery of a super-Jovian around the young Sun-like star AF Leporis
Robert J. De Rosa, Eric L. Nielsen, Zahed Wahhaj +5
(abridged) Expanding the sample of directly imaged companions to nearby, young stars that are amenable to detailed astrometric and spectroscopic studies is critical for the continu…