Anshu Kumari et al 2021 ApJ 906 79
A statistical study of 446 type IV radio bursts during solar cycle 24 shows that ~81% of type IV bursts were associated with a coronal mass ejection (CME), but only ~2.2% of CMEs were accompanied by type IV radio bursts.
Paola Re Fiorentin et al 2021 ApJL 907 L16
Clustering analysis of stars in the local volume of the Milky Way classifies 163 objects into eight kinematical groups, including a new 44-member stream, Icarus: the fast-rotating stream closest to the galactic disk to date.
Jean-Luc Margot et al 2021 AJ 161 55
A search for technosignatures focused on regions surrounding 31 Sun-like stars near the plane of the galaxy revealed ~26 million signals, of which 99.84% are classified as radio frequency interference.
H.-L. Guo et al 2021 ApJ 906 47
A new a 3D extinction map of the southern sky, covering an area of ~14,000 square degrees, uses the measured extinction for ~19 million stars to provide a view of the 3D distribution of galactic dust grains.
M. Ajello et al 2021 ApJS 252 13
The first Fermi-Large Area Telescope solar flare catalog, covering the 24th solar cycle, contains 45 Fermi-LAT solar flares with emission in the γ-ray energy band detected between 2010 and 2018.
Feige Wang et al 2021 ApJL 907 L1
The most distant quasar yet discovered, J0313−1806, demonstrates the existence of a supermassive black hole just ~670 million years after the Big Bang, significantly challenging models of black-hole growth.