Nicholas Mondrik et al 2019 ApJ 870 10

Analysis of mid-to-late M dwarfs in the MEarth survey suggest that intermediate rotators have higher flare rates than both slow and rapid rotators, possibly due to changing magnetic field geometry on the surface of the star.

Fabio Pacucci and Abraham Loeb 2019 ApJL 870 L12

The discovery of the first strongly lensed quasar at z > 6 indicates the potential presence of a substantial population of lensed z > 6 quasars misclassified and mixed up with low-z galaxies.

V. Ashley Villar et al 2018 ApJ 869 166

Estimates suggest that the upcoming Large Synoptic Survey Telescope will be able to detect ~10,000 superluminous supernovae per year with more than 10 data points each.

Eduardo Bica et al 2019 AJ 157 12

A new multi-band catalog has been released of 10,978 galactic star clusters, associations, and candidates, constructed over 20 years from Digital Sky Survey, 2MASS, WISE, VVV, Spitzer, and Herschel data.

Alan Dressler et al 2018 ApJ 869 152

Late Bloomer galaxies — massive galaxies at z < 1 that formed the majority of their stars within ~2 Gyr of the epoch of observation — account for ~20% of z ~ 0.6 galaxies with masses of the modern Milky Way.

Javier Peralta et al 2018 ApJS 239 29

A combination of different wind speed measurements for Venus suggest zonal variability possibly associated with solar tides, and variations of up to 30 m/s in the winds at the nightside lower clouds of Venus.