E. Vanzella et al 2017 ApJ 842 47
A strongly lensed pair of super star-clusters is presented at z = 3.2222 separated by ~300 pc, with magnitudes m≃30.6 and effective radius of 30 pc each. These show signs of both young and evolved stars.
M. A. Muñoz-Gutiérrez et al 2017 AJ 154 17
Dwarf-planet-sized objects can stir eccentricities and inclinations of particles in a cold debris disk, but the addition of a giant planet in the disk can act as a stabilizing agent of the orbits of cometary nuclei.
R. Sahai et al 2017 ApJ 841 110
ALMA observations confirmed the Boomerang Nebula as the coldest known object in the universe, with a massive high-speed outflow that has cooled significantly below the cosmic background temperature.
Aurora Y. Kesseli et al 2017 ApJS 230 16
Using SDSS’s Baryon Oscillation Spectroscopic Survey spectra, a library of empirical stellar spectra is created with extensive temperature (spectral types O5 – L3) and metallicity (−2.0 – +1.0 dex) coverage.
Paul D. Lasky et al 2017 ApJL 843 L1
The first measurement is made of the braking index of two putative millisecond magnetars born in short gamma-ray bursts: n = 2.9 ± 0.1 and n = 2.6 ± 0.1.
Thomas Barclay et al 2017 ApJ 841 86
Dynamical models of ejected material during late-stage planet formation suggest that ~2.5 terrestrial-mass planets are ejected per star in the Galaxy, possibly contributing to the free-floating planet population.