Alessia Moretti et al 2020 ApJL 897 L30
The disks of four jellyfish galaxies being tidally stripped of their gas by the intergalactic medium show molecular gas contents 4–5 times higher than normal galaxies of similar masses and very low star-formation efficiency.
Rui Guo et al 2020 ApJ 897 162
Analysis of local massive red spiral galaxies show signs of past mergers and suggest that their bulges formed within a short timescale before redshifts of z ~ 1–2 and were quenched via a fast mode, similar to ellipticals.
Benjamin C. Bromley and Scott J. Kenyon 2020 AJ 160 85
Modelling shows that an impact between Pluto’s companion Charon and a body of 30–100 km could have produced a disk of debris that later formed into the smaller satellites of Pluto and Charon.
Paul Robertson et al 2020 ApJ 897 125
New radial velocity measurements reveal that starspot modulation for rapidly rotating M stars frequently remains coherent for hundreds of stellar rotations, giving rise to signals that can be mistaken for exoplanets.
Pedro H. Bernardinelli et al 2020 Planet. Sci. J. 1 28
Analysis of the extreme trans-Neptunian objects detected in the first 4 years of the Dark Energy Survey show that this population is consistent with azimuthal isotropy and does not require a “Planet 9” hypothesis.
Daniel J. Whalen et al 2020 ApJL 897 L16
Cosmological simulations of direct-collapse black holes born in cold accretion flows — where they can grow to billions of solar masses by z~7 — show that these objects may be detectable by the James Webb Space Telescope.