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.
Ahmed Qureshi et al 2018 ApJ 864 65
Observations of a bifurcation in the stellar spin-period in young clusters support calculations showing that planet consumption by a star will spin up the star; the spun-up star will later spin down due to magnetic braking.
David P. Bennett et al 2018 AJ 156 113
The planetary microlensing event MOA-2011-BLG-291 has a source star that is redder (or brighter) than the bulge main sequence, suggesting that it may not lie in the galactic bulge.
Jie Jiang et al 2018 ApJ 863 159
A scheme is presented to investigate the predictability of the solar cycle over one cycle; when a cycle has been ongoing for >3 years, the sunspot group emergence can be predicted during the rest time of the cycle.
Xiaodian Chen et al 2018 ApJS 237 28
The first all-sky mid-infrared variable-star catalog based on Wide-field Infrared Survey Explorer five-year survey data contains 50,282 carefully and robustly selected periodic variables, of which 69% are new.