TUCSON, Arizona, Dec. 29 -- The Astrophysical Journal, a research journal from the American Astronomical Society that says it is devoted to recent developments, discoveries and theories in astronomy and astrophysics, published research articles on the following topics in its Jan. 1, 2023 edition: * Dominance of Bursty over Steady Heating of the 4-8 MK Coronal Plasma in a Solar Active Region: Quantification Using Maps of Minimum, Maximum, and Average Brightness * Investigation of Dust Grains by  more