Vaidehi S. Paliya et al 2020 ApJL 903 L8
The first γ-ray emitting BL Lac object — a class of jetted active galactic nuclei — has been found at a redshift beyond z = 3, i.e., within the first two billion years of the age of the universe.
Edward Ashton et al 2020 Planet. Sci. J. 1 52
New analysis of archival data from the Canada–France–Hawaii Telescope reveals 52 objects that are likely small irregular moons of Jupiter, suggesting a total population of ~600 radius >0.4 km moons around the planet.
Jonathan D. Slavin et al 2020 ApJ 902 135
Hydrodynamical calculations track the ejection and survival rates of dust grains produced in supernovae, demonstrating that supernovae, under the right conditions, can be significant sources of interstellar dust.
Gerardo J. M. Luna et al 2020 ApJL 902 L14
The recurrent nova T CrB is currently in the midst of an accretion high state similar to ones that may have led to past nova eruptions, suggesting that another thermonuclear runaway is likely within the next few years.
J. Anthony Tyson et al 2020 AJ 160 226
New analysis shows that, in the event of 48,000 low-Earth-orbit artificial satellites like those of SpaceX, about 1% of pixels in the Vera Rubin Observatory’s LSST nautical twilight images would need to be masked to prevent trails from damaging the data.
Guillaume F. Thomas et al 2020 ApJ 902 89
An study of the structure, kinematics, and orbit of a newly found stellar stream emanating from the globular cluster M92 indicates that it was likely formed very recently (during the last ~500 Myr).