Kimberly R. Sokal et al 2018 ApJ 853 120

New high-resolution near-infrared spectroscopic observations with (IGRINS) of TW Hya suggest the star has an age of 8 Myr, which is well past the median life of gaseous disks.

Joseph E. Rodriguez et al 2018 AJ 155 72

Three small transiting super-Earth planets were found orbiting GJ 9827 — a bright K-dwarf star and the closest exoplanet host discovered by K2 to date — with orbital periods of 1.2, 3.6, and 6.2 days.

X. L. Yan et al 2018 ApJL 853 L18

A spectacular eruptive flare in September 2017 allowed for the simultaneous observation of a flux rope eruption followed by the inflow, the formation of a current sheet, and a cusp structure.

Theodoros Bitsakis et al 2018 ApJ 853 104

The age distribution of 1,319 star clusters detected by a fully-automated method in the central 18 deg² of the Small Magellanic Cloud suggests enhanced cluster formation around 240 Myr ago.

M. L. Lister et al 2018 ApJS 234 12

VLBA-produced total intensity and linear polarization maps are presented for 437 active galactic nuclei, ~80% of which are associated with γ-ray sources detected by the Fermi LAT instrument.

K. M. Punzi et al 2018 AJ 155 33

The extreme optical dropout events and large excess infrared emission of the erratically variable star RZ Piscium may be due to the recent destruction of one or more massive orbiting bodies within 1 AU of the star.