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.

Yasuhiro Hasegawa et al 2019 ApJL 876 L32

Models attempting to reproduce the heavy-element content trend of observed exoplanets imply that planets initially underwent efficient solid accretion beyond r ≥ 0.6 AU and subsequently migrated to their present locations.

Raffaele D’Abrusco et al 2019 ApJS 242 4

Two new catalogs are presented of radio-loud candidate blazars with mid-infrared colors consistent with the colors of confirmed γ-ray-emitting blazars; these catalogs will help with identification of the γ-ray sky.