L. Molnár et al 2018 ApJS 234 37
In the field of view surrounding Uranus, 608 main-belt asteroids were observed with K2. The resulting light curves revealed rotation rates for 90 of these asteroids (86 of which were previously unknown).
Neil T. Lewis et al 2018 ApJ 854 171
New models demonstrate that the presence of a continent located at the substellar point on a planet causes global cooling and increases day–night temperature contrasts by limiting heat redistribution.
L. Fossati et al 2018 AJ 155 113
Far-ultraviolet observations of WASP-18 with Hubble suggest that the star’s unusually low activity level is intrinsic, possibly caused by star–planet tidal interaction with its massive, very close-in Jupiter-like planet.
Semyeong Oh et al 2018 ApJ 854 138
Kronos and Krios, a co-moving pair of similar stars likely in a wide binary, have unexpectedly different chemical abundances — potentially a sign that Kronos accreted ~15 Earth-masses of rocky material after birth.
Marian Karlický et al 2018 ApJL 854 L29
A rare slow, positively drifting radio burst observed on the Sun in 2015 November may have been generated by a thermal conduction front formed in front of a falling, hot, extreme-ultraviolet blob of plasma.
Marshall C. Johnson et al 2018 AJ 155 100
The hot Jupiter KELT-21b transits a star that may have two stellar companions of ~0.12 solar masses. KELT-21b may be one of only a handful of known transiting planets in hierarchical triple stellar systems.