Brian C. Lacki et al 2021 ApJS 257 42
The 816 targets in the catalog comprise archetypical, superlative, enigmatic, and everyday examples of a wide variety of astrophysical sources, which can be used to guide searches for extraterrestrial intelligence.
Navdeep K. Panesar et al 2021 ApJL 921 L20
Small-scale solar heating events dubbed “campfires” may encompass a variety of dynamic features that contain enough energy to heat a localized region of the solar atmosphere to 500,000–2,500,000K for roughly 10 minutes.
Paz Beniamini and Wenbin Lu 2021 ApJ 920 109
Supramassive neutron stars are supported against collapse by their fast rotation, but theory and observations fail to agree on their lifetimes and collapse energies; future all-sky radio surveys make resolve this tension.
Nicole C. Shibley and Gregory Laughlin 2021 Planet. Sci. J. 2 221
The behavior of Europa’s intermittent water-vapor geysers might be explained by release of carbon dioxide gas, which can launch ejecta 200 km above the icy moon’s surface, where it persists for ~10 minutes.
Bharti Arora et al 2021 AJ 162 257
Just 12 years to go: observations around the year 2034 should resolve the remaining uncertainty about the orbital parameters of WR 125 — a Wolf-Rayet star that is known to periodically produce dust and undergo dimming.
Minghao Yue et al 2021 ApJL 921 L27
Quasar pair candidate J2037–4537 is likely a bona fide quasar pair — allowing for the first constraint on the quasar pair fraction at z>5 — due to the distinct spectral features of the two images and the lack of a lensing galaxy.