Qiaoling Li et al 2019 ApJ 886 149
Observations of sunspots in three regions of the active region NOAA 12673 show that sunspot penumbrae evolve through the interaction of the preexisting magnetic field system and the later-emerging magnetic field system.
Smadar Naoz et al 2020 ApJL 888 L8
Could a supermassive black hole binary exist in our galactic center, rather than a singlesupermassive black hole? New calculations place limits on the properties of the companion to Sgr A*, should it exist.
Robert J. De Rosa et al 2020 AJ 159 1
Four years of observations with the Gemini Planet Imager indicate that the young, directly-imaged exoplanet 51 Eridani b is on an eccentric orbit with a semimajor axis of ~11.1 AU and a period of 28 years.
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.