Scott J. Kenyon et al 2018 ApJ 864 130

For typical hypervelocity stars ejected from the galactic center toward low (high) galactic latitudes, the disk bends trajectories by up to 30° (3°–10°); the Large Magellanic Cloud often produces similar deflections.

Ping Zhou et al 2018 ApJL 865 L6

XMM-Newton observations of the supernova remnant SNR G7.7−3.7 suggest that its position and age are compatible with a supernova origin noted in Chinese historical records as a “guest star” in 386 CE.

Joshua Krissansen-Totton et al 2018 AJ 156 114

~10 transit observations of a planet with JWST may be sufficient to detect carbon dioxide and constrain methane abundances sufficiently well to rule out known, nonbiological methane production scenarios.

Sanjaya Paudel et al 2018 ApJS 237 36

The largest publicly available catalog of interacting dwarf galaxie is presented, including 177 nearby merging dwarf galaxies of stellar mass M_* < 10¹⁰ M_⊙ and redshifts z < 0.02.

Guangwen Chen et al 2018 ApJ 864 72

The ring structures of collisional ring galaxies — formed through off-center collisions between a target galaxy and an intruder dwarf galaxy — are found to be strongest for those with small bulge-to-disk mass ratios.

Jaehan Bae et al 2018 ApJL 864 L26

Simulations demonstrate that that protoplanetary disks with a giant planet can reveal diverse morphology in (sub)millimeter continuum, including structures with multiple gaps and rings.