Maciek Wielgus et al 2020 ApJ 901 67
Prototype Event Horizon Telescope array observations of the supermassive black hole at the center of M87 show persistence of the ~40-µas-diameter, bright, asymmetric ring throughout 2009–2017.
Armen Tokadjian and Anthony L. Piro 2020 AJ 160 194
Tidal models applied to known exoplanet systems show that there are at least 36 systems in which an exoplanet in the habitable zone may host an exomoon for longer than one gigayear.
Manasvi Lingam and Abraham Loeb 2020 ApJL 901 L11
Models indicate that the maximum biomass that might be sustainable in deep subsurface environments might be roughly three orders of magnitude smaller than Earth’s global biomass, under ideal circumstances.
Scott J. Kenyon and Benjamin C. Bromley 2020 Planet. Sci. J. 1 40
According to new modeling, New Horizons’s crater counts on Pluto’s moon Charon match the frequencies expected from collisional cascades of solids with bulk strength intermediate between weak and normal ice.
Minghao Guo et al 2020 ApJ 901 39
New 3D simulations show that large black holes ejected from galactic nuclei could be spotted by ALMA and other facilities as the black holes wander the outskirts of galaxies, slowly accreting matter.
Natalie R. Hinkel et al 2020 ApJL 900 L38
A new study of abundances indicates that, in general, plankton, Earth, and Mars are phosphorous-rich compared with nearby stars, but there’s a dearth of phosphorous abundance data, making it difficult to draw conclusions.