Kevin K. Hardegree-Ullman et al 2021 AJ 161 219
Spitzer photometry has been used to validate a sixth planet in the planetary system K2-138, which had previously been shown by citizen science discoveries to contain one super-Earth and four sub-Neptunes.
K. J. Napier et al 2021 Planet. Sci. J. 2 59
New analysis of the properties of 14 Dark-Energy-Survey-detected extreme trans-Neptunian objects shows they are consistent with a uniform population, suggesting Planet Nine is not necessary to explain their behavior.
Krista Lynne Smith et al 2021 ApJ 911 43
The TESS exoplanet-hunting mission recently detected the rising and decaying optical afterglow of GRB 191016A, a long gamma-ray burst detected by Swift-BAT; such detections by TESS are likely to be made ~once per year.
Vedant Chandra and Kevin C. Schlaufman 2021 AJ 161 197
Application of a newly developed classifier to data produced by next-generation spectroscopic surveys may allow us to identify the lowest-mass stars of primordial composition, based on their optical-to-infrared colors.
Yilin Guo et al 2021 ApJL 911 L9
New observations of an on-disk prominence bubble around a filament barb has allowed for a 3D reconstruction of its structure, allowing for exploration of how the boundary is shaped by underlying magnetic fields.
Dan Qiu et al 2021 ApJS 253 58
Analysis of 4,050 wide binary star systems involving a white dwarf and usually a main-sequence star allowed for age determinations for 3,551 white dwarfs that can likely be extrapolated to their low-mass companions.