E. T. Dunham et al 2019 ApJ 877 41
New models of the dwarf planet Haumea’s shape, structure, and composition suggest this body has a core of hydrated silicates and a thick (67 to 167 km thick!) ice crust.
Athanasios Papageorgiou et al 2019 ApJS 242 6
The physical properties — including temperature ratio, the sum of relative radii, and orbital inclination — are determined for 2,281 eclipsing binaries from light-curve data from the Catalina Sky Survey.
Wanying Kang 2019 ApJL 877 L6
3D modeling suggests that a high-obliquity planet’s stratosphere could be >3 orders of magnitude moister than a low-obliquity equivalent, indicating water escape on high-obliquity planets may cause rapid loss of habitability.
Nicholas Z. Rui et al 2019 ApJ 877 37
Hubble infrared observations of stars in the Quintuplet star cluster — a massive star cluster near the galactic center (GC) — provide evidence that young massive clusters in the GC dissolve on a several-megayear timescale.
Audrey Thirouin and Scott S. Sheppard 2019 AJ 157 228
Light curves for 42 cold classical trans-Neptunian objects (TNOs) — primordial planetesimals in our solar system — demonstrate that they have slower rotations and are more elongated/deformed than other TNOs.
Shih-Yun Tang et al 2019 ApJ 877 12
Tidal structures have been discovered around the intermediate-aged (~700–800 Myr), nearby (~85 pc), disrupting star cluster Coma Berenices; an adjacent stellar group is also found in the final stages of disruption.