Benjamin F. Williams et al 2018 ApJS 239 13
A combination of deep new Chandra ACIS-I observations and extensive Hubble imaging from the Panchromatic Hubble Andromeda Treasury of the M31 disk reveals 373 X-ray sources, 170 of which are new discoveries.
Rachael M. Roettenbacher and Krisztián Vida 2018 ApJ 868 3
An analysis of a subset of Kepler stars suggests that the strongest stellar flares do not correlate to the largest starspot group present, but weaker flares do show an increased occurrence close to starspot groups.
Satoshi Mayama et al 2018 ApJL 868 L3
ALMA has revealed a misaligned inner gas disk inside the ~120-AU cavity in the face-on transitional disk 2MASS J16042165-2130284; its internal asymmetric structures may cause observed light-curve variations of the host star.
Liang Yu et al 2018 AJ 156 250
EPIC 246851721 b is a “tropical” Jupiter in a 6.18-day orbit around a bright, rapidly rotating F star; it has an aligned spin–orbit geometry that is likely to be primordial rather than a result of tidal damping.
Natalia Żywucka et al 2018 ApJ 867 131
The Magellanic Quasars Survey, which targeted the Large Magellanic Cloud and 70% of the Small Magellanic Cloud, identified a sample of 44 blazar candidates located behind the Clouds.
Kevin France et al 2018 ApJS 239 16
A survey of far-ultraviolet emission-line spectra from over 100 F, G, K, and M dwarfs reveals that exoplanet host stars display factors of 5–10 lower UV activity levels compared with the non-planet-hosting sample.