Joss Bland-Hawthorn et al 2019 ApJ 886 45
New observations show that some Magellanic Stream clouds toward both galactic poles are highly ionized, suggesting a past burst or flare of ionizing radiation from the supermassive black hole at our galaxy’s center.
T. H. Jarrett et al 2019 ApJS 245 25
A new catalog contains mid-infrared photometry and measured global properties of the 100 largest galaxies in the sky, including the Magellanic Clouds, Local Group galaxies M31 and M33, and the Fornax and Virgo galaxy cluster giants.
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.