K. D. Alexander et al 2018 ApJL 863 L18

New observations of the binary neutron star merger GW170817 at Δt ≈ 220–290 days post-merger support models of a successful structured jet expanding into a low-density circumbinary medium.

Igor V. Chilingarian et al 2018 ApJ 863 1

Using data mining in wide-field sky surveys, scientists have identified a sample of 305 intermediate-mass black hole candidates and confirmed the active galactic nucleus nature of 10 of these sources.

Melodie M. Kao et al 2018 ApJS 237 25

Jansky VLA observations of a sample of five known radio-emitting late-L and T dwarfs suggest that age, mass, and temperature together cannot account for the strong magnetic fields produced by the targets.

Yin-Bi Li et al 2018 AJ 156 87

A newly discovered late-B-type unbound hyper-runaway star (LAMOST-HVS4) was probably ejected from the galactic disk by supernova explosion or multiple-body interactions in dense young stellar clusters.

Qian Yang et al 2018 ApJ 862 109

21 new changing-look active galactic nuclei — AGN that exhibit the appearance or disappearance of broad Balmer emission lines within a few years — have been discovered, doubling the number of these objects known.

S. Ansoldi et al 2018 ApJL 863 L10

MAGIC very-high-energy observations of the blazar TXS 0506+056, combined with detailed jet modeling, corroborate a connection between the object’s high-energy radiation and the neutrino detected from its direction.