Gianni Cataldi et al 2020 ApJ 892 99

ALMA observations reveal a very low mass of neutral carbon in the CO-rich debris disk around the star HD 32297, possibly suggesting the capture of carbon onto dust grains, followed by rapid CO re-formation and rerelease.

Tianjun Gan et al 2020 AJ 159 160

LHS 1815b is the first planet to be found in the galactic thick disk, providing an opportunity to learn about differences in formation efficiency and evolution for planetary systems between different galactic components.

C. E. Barbosa et al 2020 ApJS 247 46

A systematic study of the stellar populations of ultra-diffuse galaxies (UDGs) in the field suggests that field UDGs have more extended star formation histories than UDGs in clusters, including some forming stars now.

A. Albert et al 2020 ApJ 892 92

A search for point-like and extended sources of cosmic neutrinos using data collected by the ANTARES and IceCube neutrino telescopes revealed no sources, setting upper limits on flux, particularly around the galactic center.

Paul Michael Schenk 2020 ApJL 892 L12

Low-resolution global imaging maps of Europa’s surface obtained in 1979, 1996–1998, and 2007 by Voyager, Galileo, and New Horizons reveal no obvious surface changes related to plume activity on the satellite.

Hiromichi Tagawa et al 2020 ApJ 892 36

Models show that when collapsing gas fragments at higher densities, the central protostar avoids contraction and keeps growing via frequent stellar mergers, reaching masses as high as ~10⁵–10⁶ M_⊙.