Themiya Nanayakkara et al 2023 ApJL 947 L26
Many galaxies with redshifts between 4 and 7 observed by JWST appear to be blue and dustless, supporting the picture of dust within galaxies building up over cosmic time.
Mika Lambert et al 2023 AJ 165 218
What was first categorized as a planet turns out to be a very low-mass star, barely massive enough to fuse hydrogen into helium; further study of the star constrained its activity level and rotation period.
Claudio Ricci and Stéphane Paltani 2023 ApJ 945 55
Adding a dash of dust to a ray-tracing model illuminates the ways that X-ray photons interact with dust grains, yielding results applicable to studies of dusty active galactic nucleus torii.
Thomas Ayres 2023 ApJS 266 6
The Wilson–Bappu effect describes the correlation between a star’s luminosity and the strength of a particular calcium emission line arising from its chromosphere.
Giovanni Sabatini et al 2023 ApJL 947 L18
Cosmic rays — high-energy charged particles accelerated by distant cosmic engines — play an important role in determining the composition and ionization state of star-forming molecular clouds.
Jaegeun Park et al 2023 ApJ 945 33
X-ray data illuminate the particle properties of a pulsar wind nebula; these observations suggest that even higher-energy particles may be present in the source, opening avenues for more study.