P. Frank Winkler et al 2021 ApJ 908 80
Within a sample of 179 supernova remnants and candidates found in the galaxy M51, most have properties similar to those found in other nearby spiral galaxie, though their [N ii]:Hα ratios are unusually high.
M. Hilton et al 2021 ApJS 253 3
A new catalog of 4,195 optically confirmed Sunyaev–Zel’dovich selected galaxy clusters will be a useful resource for future cosmological analyses and studying evolution within massive clusters over the past 10 years.
Philip Lu et al 2021 ApJL 908 L23
New cosmology-independent limits are set on the abundance of primordial black holes by considering interactions of these objects with the interstellar medium, which result in the heating of gas.
Quanzhi Ye et al 2021 Planet. Sci. J. 2 23
Analysis of (3200) Phaethon, a large near-Earth asteroid and potential parent of the Geminid meteoroid stream, suggests that the DESTINY+ mission to explore Phaethon in 2026 may not be able to directly detect a gas coma.
Sjoert van Velzen et al 2021 ApJ 908 4
17 new tidal disruption events (TDEs) have been detected by the Zwicky Transient Facility and followed up with Swift UV and X-ray observations, allowing homogeneous analysis of a total sample of ~30 TDE light curves.
Adam G. Riess et al 2021 ApJL 908 L6
Recalibration of the extragalactic distance ladder using new observations of 75 Milky Way Cepheids results in a measured Hubble-constant value in 4.2σ tension with the prediction from Planck CMB observations under ΛCDM.