P. Iwanek et al 2019 ApJ 879 114
Two decades of Optical Gravitational Lensing Experiment (OGLE) data have uncovered 12,660 spotted variable stars toward and inside the galactic bulge, the vast majority of which are giants.
Rayna Rampalli et al 2019 AJ 158 62
The long-running search for a giant transiting planet in an open cluster remains fruitless after a recent candidate, a hot Saturn orbiting the late F star K2-308, is shown to not belong to the open cluster NGC 1817 after all.
Megan E. Schwamb et al 2019 ApJS 243 12
Early results from Col-OSSOS, which is acquiring g, r, and J photometry of 100 trans-Neptunian objects, suggest that the primordial solar system protoplanetesimal disk is neutral-class rather than red-class dominated.
B. Militzer et al 2019 ApJ 879 78
New computational modeling methods predict a dense central core of ~15–18 Earth masses for Saturn, an additional 1.5–5 Earth masses of heavy elements in the envelope, and a rotation period of 10:33:34 hr ± 55 s.
Kazuhiro D. Kanagawa 2019 ApJL 879 L19
Hydrodynamic simulations reveal that when a planet opens a gap in a protoplanetary disk, dust feedback can reduce the surface density at the outer edge of the gap, terminating inward migration of the planet.
Jura Borissova et al 2019 AJ 158 46
A combination of near-infrared photometry, spectroscopy, and astrometry has revealed 29 OB type, Wolf–Rayet, and emission-line stars in the nearby star-forming complex G305 — 18 of which are newly classified.