Adam G. Riess et al 2018 ApJ 853 126
Analysis of a new sample of 15 Type Ia supernovae at redshift z > 1 have led to a factor of ~3 improvement in the determination of the expansion rate at z = 1.5, reducing its uncertainty to ~20%.
A. Aab et al 2018 ApJL 853 L29
New analysis of data from the Pierre Auger Observatory provides evidence for anisotropy in the arrival directions of ultra-high-energy cosmic rays — indicative of excess arrivals from strong, nearby sources.
Glenn Schneider et al 2018 AJ 155 77
The HR 4796A ringlike debris disk is revealed by Hubble to be embedded within a much larger, morphologically complex, and biaxially asymmetric exo-ring scattering structure.
Peter Camps et al 2018 ApJS 234 20
Dust-attenuated and dust emission fluxes are presented for hundreds of thousands of sufficiently resolved simulated galaxies in the EAGLE suite of cosmological hydrodynamical simulations.
Kimberly R. Sokal et al 2018 ApJ 853 120
New high-resolution near-infrared spectroscopic observations with (IGRINS) of TW Hya suggest the star has an age of 8 Myr, which is well past the median life of gaseous disks.
Joseph E. Rodriguez et al 2018 AJ 155 72
Three small transiting super-Earth planets were found orbiting GJ 9827 — a bright K-dwarf star and the closest exoplanet host discovered by K2 to date — with orbital periods of 1.2, 3.6, and 6.2 days.