TUCSON, Arizona, Feb. 16 -- 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 Feb. 20, 2023 edition: * Coronal Abundances in an Active Region: Evolution and Underlying Chromospheric and Transition Region Properties * Coronal Loop Heating by Nearly Incompressible Magnetohydrodynamic and Reduced Magne  more