Knicole D. Colón et al 2018 AJ 156 227
New photometric observations of the disintegrating planet K2-22b suggest that its transit depths are similar in 2016-2017 to what they were in 2014-2015, though there’s ongoing variability in transit shape and time.
Nikhil Mahajan et al 2018 ApJL 867 L2
The pulse profile of PSR B1957+20, a millisecond pulsar, switches between two quasi-stable modes of emission; the time between mode changes is only 1.7 s (~1000 rotations), the shortest observed to date.
S. Mathur et al 2018 ApJ 866 123
The quasar Mrk 590 appears to again be changing its appearance, indicating that the change in AGN type is neither due to obscuration nor due to one-way evolution; it may instead be related to episodic accretion events.
Joseph L. Hora et al 2018 ApJS 238 22
Light curves, periods, and amplitudes are presented for a subset of 38 near-Earth objects observed at 4.5 μm with the IRAC camera on the the Spitzer Space Telescope.
Travis A. Berger et al 2018 ApJ 866 99
Revised radii of 177,911 Kepler stars and their planets are calculated from Gaia DR2 data; ~67% of all Kepler targets are found to be main-sequence stars, ~21% subgiants, and ~12% red giants.
Elisabeth R. Newton et al 2018 AJ 156 217
Long-term, ground-based photometric monitoring from the MEarth Observatory is used to measure 234 rotation periods for nearby, southern hemisphere M dwarfs, including exoplanet hosts like Proxima Centauri.