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Kepler Multi-planet Systems Exhibit Unexpected Intra-system Uniformity in Mass and Radius
The widespread prevalence of close-in, nearly coplanar super-Earth- and sub-Neptune-sized planets in multiple-planet systems was one of the most surprising results from the Kepler mission. By
Constraints on Planet Nine’s Orbit and Sky Position within a Framework of Mean-motion Resonances
A number of authors have proposed that the statistically significant orbital alignment of the most distant Kuiper Belt Objects (KBOs) is evidence of an as-yet undetected planet in the outer solar
Evolution of flare ribbons, electric currents, and quasi-separatrix layers during an X-class flare
Context. The standard model for eruptive flares has been extended to three dimensions (3D) in the past few years. This model predicts typical J -shaped photospheric footprints of the coronal current
Tidal Inflation Reconciles Low-density Sub-Saturns with Core Accretion
While the Solar System contains no planets between the sizes of Uranus and Saturn, our current exoplanet census includes several dozen such planets with well-measured masses and radii. These
Obliquity Tides May Drive WASP-12b’s Rapid Orbital Decay
Recent analyses have revealed a mystery. The orbital period of the highly inflated hot Jupiter, WASP-12b, is decreasing rapidly. The rate of inspiral, however, is too fast to be explained by either
Tidally Induced Radius Inflation of Sub-Neptunes
Recent work suggests that many short-period super-Earth and sub-Neptune planets may have significant spin axis tilts ("obliquities"). When planets are locked in high-obliquity states, the tidal
Signatures of Obliquity in Thermal Phase Curves of Hot Jupiters
Recent work suggests that many short-period extrasolar planets may have spin obliquities that are significantly tilted with respect to their orbital planes. These large obliquities are a natural
Discovery and Dynamical Analysis of an Extreme Trans-Neptunian Object with a High Orbital Inclination
We report the discovery and dynamical analysis of 2015 BP519, an extreme trans-Neptunian object (TNO) detected by the Dark Energy Survey at a heliocentric distance of 55 au, perihelion of ∼36 au, and
Formation of Ultra-short-period Planets by Obliquity-driven Tidal Runaway
Small, rocky planets have been found orbiting in extreme proximity to their host stars, sometimes down to only $\sim 2$ stellar radii. These ultra-short-period planets (USPs) likely did not form in
New Constraints on Gliese 876 - Exemplar of Mean-Motion Resonance
Gliese 876 harbors one of the most dynamically rich and well-studied exoplanetary systems. The nearby M4V dwarf hosts four known planets, the outer three of which are trapped in a Laplace mean-motion