Adrian S. Hamers and Simon F. Portegies Zwart 2018 ApJL 869 L27
The observed characteristics of the Kepler 1625 system can be explained by the tidal capture of a secondary, Neptune-like planet in the young system that was turned into a moon by its capture.
Meghin E. Spencer et al 2018 AJ 156 257
The binary fractions in Draco and Ursa Minor (~50% and ~78%) suggest that the binary fraction might be larger in dwarf spheroidal galaxies that formed their stars quickly and/or have high velocity dispersions.
Gina E. Duggan et al 2018 ApJ 869 50
Measurements of barium abundances in dwarf galaxies indicate that neutron-star mergers are the most likely source of r-process element production in dwarf galaxies at early times.
Christopher Spalding 2018 ApJL 869 L17
Models demonstrate that leftover debris interior to Mercury’s current orbit could have been driven outward by the early solar wind, clearing this region and providing material for terrestrial planets and asteroids.
Yang Wang et al 2018 ApJ 868 130
Hydrodynamical resimulations exploring the relationship between galaxy properties and evironment suggest that galaxies in denser environments tend to be redder and are more likely to be quenched.
T. M. C. Abbott et al 2018 ApJS 239 18
The first public data release of the Dark Energy Survey consists of optical/near-infared images from ~5000 deg2 of the southern galactic cap, including nearly 400 million distinct astronomical objects.