Matthew A. Taylor et al 2018 ApJL 867 L15
Fifteen new dwarf galaxies are discovered in the Western halo of the nearby giant elliptical galaxy NGC 5128 at projected distances of ~100–225 kpc from their giant host.
Andrew Vanderburg et al 2018 AJ 156 184
The radial-velocity signal estimated for a candidate exomoon suggests that large exomoons around directly imaged planets orbiting bright, nearby stars may be detectable with current or next generation instrumentation.
D. J. Mullan and H. P. Bais 2018 ApJ 865 101
Photosynthesis on a habitable-zone planet orbiting an M-dwarf host is less effective than on Earth by a factor of 10–100 or more during the host’s quiescent state; during flares, this can increase up to 50–60% the values on Earth.
T. Hung et al 2018 ApJS 238 15
A systematic selection of tidal disruption events (TDEs) in the wide-area (4800 deg2) view of the iPTF experiment finds 2 confirmed TDEs, suggesting a TDE per galaxy rate of ~1.7 x 10-4 per galaxy per year.
Eva H. L. Bodman et al 2018 AJ 156 173
Compositional features of a dusty tail trailing a disintegrating planet will be detectable by the James Webb Space Telescope for transit depths of ~0.3% in the visible range, allowing us to learn about planet interiors.
P. Bennet et al 2018 ApJL 866 L11
Observations of two new ultra-diffuse galaxies (UDGs), suggest that galaxy interactions could form some UDGs by 1) expanding ordinary dwarf galaxies, or 2) causing a UDG to collapse out of tidal material.