Yuma Sugahara et al 2019 ApJ 886 29
The measured velocities of galactic outflows in seven star-forming galaxies at z = 5–6 are used to demonstrate that outflow velocity is physically related to the halo circular velocity over redshifts of z = 0–6.
Katrin Heitmann et al 2019 ApJS 245 16
The Outer Rim cosmological simulation, one of the largest high-resolution N-body simulations performed to date, covers a volume of (4.225 Gpc)3 and evolves more than one trillion particles.
Alonso Luna et al 2019 ApJL 887 L39
Data from Gaia DR 2 and the VISTA Variables in the Via Lactea (VVV) Survey has led to the discovery of seven candidate hypervelocity red clump stars in the Milky Way bulge and paved the way for more such findings.
Bruce G. Elmegreen and Debra Meloy Elmegreen 2019 ApJS 245 14
Spitzer Space Telescope observations of 15 spiral galaxies show numerous dense cores at 8 μm that, with a possible age between 0.2 and 2 Myr, likely represent the earliest phase for most star formation in these galaxies.
Sebastien Guillot et al 2019 ApJL 887 L27
NICER observations show X-ray pulsations in five new millisecond pulsars, providing promising future targets to constrain the neutron star mass–radius relation and the dense matter equation of state.
Mikkel N. Lund et al 2019 AJ 158 248
Asteroseismic characterization of K2-93, a star that hosts five planets from sub-Neptune to Jupiter size, constrains the stellar parameters and the orbital periods of the outer planets.