Weida Hu et al 2017 ApJL 845 L16

The Magellan telescope in Chile has been used to spectroscopically confirm nine narrowband-selected Lyman-alpha-emitting galaxies located at z ≥ 7, roughly tripling the sample size.

Trent J. Dupuy and Michael C. Liu 2017 ApJS 231 15

A decade of astrometric monitoring of 31 ultracool binaries with component spectral types M7–T5 have allowed the precise determination of 38 individual masses spanning 30–115 Jupiter masses.

T. Izumi et al 2017 ApJL 845 L5

ALMA observations of the low-luminosity active galactic nucleus of NGC 1097 reveal a lack of a dense and compact cold molecular torus, implying less active nuclear star formation and/or inflows in NGC 1097.

Michael E. Brown 2017 AJ 154 65

The bias of observations of Kuiper-belt-object (KBO) clustering is assessed. While observational bias is shown to be present, it is unlikely to explain the observed alignment of distant eccentric KBOs.

M. Fernández-López et al 2017 ApJ 845 10

ALMA observations uncovered the strongly misaligned, dusty disks of a young triple system of protostars, SR24, and revealed information about their sizes, inclinations, and rotation directions.

Yi-Kuan Chiang et al 2017 ApJL 844 L23

Simulations show that protoclusters — extended structures containing numerous star-forming galaxies — may have been crucial in driving the timing and topology of cosmic reionization.