M. M. Hedman et al 2020 AJ 159 129
Among Saturn’s small satellites, Aegaeon, Methone, and Pallene may be darkened by high-energy radiation, and Calypso and Helene may be brightened by enhanced dust fluxes.
Al Lawrence et al 2020 ApJ 891 11
Mid-infrared Spitzer data shows that NGC 4490, one of the closest interacting/merging galactic systems, has a double nucleus morphology with one nucleus visible in the optical and the other only in infrared and radio.
András Pál et al 2020 ApJS 247 26
The first data release of photometric analysis of TESS observations of small solar system bodies contains 9,912 light curves, primarily of bright main-belt asteroid and Jovian Trojan populations.
Meers Oppenheim et al 2020 ApJL 891 L9
Simulations and analytical theory showing that atmospheric flows originating in the Sun’s photosphere will frequently drive a previously unidentified thermal plasma instability that rapidly develops into turbulence.
Shunya Takekawa et al 2020 ApJ 890 167
A clump of gas within a high-velocity compact cloud near our galaxy’s center has kinematic structure that points to the presence of a quiescent black hole of ~10,000 solar masses — a candidate intermediate-mass black hole.
Kristine W. F. Lam et al 2020 AJ 159 120
A previously undetected outer planet has been discovered orbiting K2-146, a dwarf star that already hosts one known planet, a mini-Neptune; the two planets may be in a mean motion resonance.