Grace Wolf-Chase et al 2021 ApJ 911 28

The properties of ~500 “yellowballs” have been measured in a pilot region of the galactic plane, demonstrating that ~20–30% of these sources contain high-mass star formation capable of becoming expanding H II regions.

E. C. Czaplinski et al 2021 Planet. Sci. J. 2 51

A high-resolution geologic map is presented for the southwest peak-ring area of the Schrödinger basin, a region that would be well-suited to a robotic lunar sample return mission in the future.

Michael Zevin et al 2021 ApJ 910 152

Analysis of the second LIGO–Virgo catalog of gravitational-wave transients suggetss that a mixture of formation channels for the binaries is strongly preferred over any single channel dominating the detected population.

David L. Nidever et al 2021 AJ 161 192

The second data release (DR2) of the NOIRLab Source Catalog contains over 3.9 billion unique objects with 68 billion individual source measurements, covering ~35,000 square degrees of the sky.

Wolfgang E. Kerzendorf et al 2021 ApJL 910 L23

With a modest training set of 100,000 spectra, Dalek, an emulator for the TARDIS supernova radiative transfer code, can model Type Ia supernova spectra with percent-level accuracy and a speedup of several orders of magnitude.

Vaidehi S. Paliya et al 2021 ApJS 253 46

A catalog of central engine properties for a sample of 1,077 blazars detected with the Fermi LAT indicate that the overall physical properties of Fermi blazars are likely to be controlled by the accretion rate.