Valentin Christiaens et al 2019 ApJL 877 L33
Observations with the Very Large Telescope have revealed evidence for a circumplanetary disk surrounding the protoplanet PDS 70 b (even as ALMA observations have recently indicated a similar disk around PDS 70 c).
Joshua Tollefson et al 2019 AJ 157 251
ALMA’s spatially resolved millimeter maps of Neptune provide important constraints on the atmospheric structure and dynamics of the planet, revealing details like unaccounted-for complex structure at the equator.
Alexander H. Riley et al 2019 ApJ 878 8
New data from the Fermi Large Area Telescope suggest that the debris-disk-hosting main-sequence star ε Eridani may be a source of gamma rays — the only main-sequence source of gamma-rays known besides the Sun.
Izumi Hachisu and Mariko Kato 2019 ApJS 242 18
Analysis of the light curves of a set of 32 galactic classical novae — thermonuclear explosions of white-dwarfs — provides the distances and white-dwarf masses using a single, uniform method.
Maria A. Loukitcheva et al 2019 ApJL 877 L26
ALMA observations of a quiet-Sun region reveal distinct particularly dark and cool areas in the millimeter maps with temperatures as low as 60% of the normal quiet Sun at 3 mm, something not seen in other data.
Joel Leja et al 2019 ApJ 877 140
New fits to the photometry of 58,461 galaxies from the 3D-HST catalogs at 0.5 < z < 2.5 imply an older, more quiescent universe than found by previous studies at these redshifts.