K. Bansal et al 2017 ApJ 843 14
The relative motion of the two cores of a supermassive black hole binary is measured in radio galaxy 0402+379 and used to constrain the system. This is the first black hole system resolved as a visual binary.
Michael R. Blanton et al 2017 AJ 154 28
An overview of SDSS-IV is provided, including its major spectroscopic programs: APO Galactic Evolution Experiment 2, Mapping Nearby Galaxies at APO, and extended Baryon Oscillation Spectroscopic Survey.
Adam Smercina et al 2017 ApJL 843 L6
New observations with the Subaru Hyper Suprime-Cam identify a new dwarf galaxy that may be a satellite of BK5N, which is in turn a satellite of M81. This may be one of the first detected satellites-of-a-satellite.
Eric S. Perlman et al 2017 ApJ 842 126
New VLBA and VLA observations show that the decay of radio flux after the tidal disruption event IGR J12580+0134 in 2010 is consistent with predictions from a jet-circumnuclear medium interaction model.
R. Chhiber et al 2017 ApJS 230 21
Three-dimensional magnetohydrodynamic simulation of the solar wind are used to calculate cosmic-ray diffusion coefficients throughout the inner heliosphere (i.e., from 2 solar radii to 3 AU).
A. Dias-Oliveira et al 2017 AJ 154 22
Four occultation measurements of the plutino object (208996) 2003 AZ84 reveal that it is a triaxial body with a topographic feature that may be an abrupt chasm 23 km wide and at least 8 km deep.