Nebular Spectra of the Extremely Metal-Poor SN II 2023ufx Over a Year After Explosion: A Massive Progenitor and Unique Circumstellar Environment

Evan Jennerjahn, Michael A. Tucker, Christopher S. Kochanek +3

We present new observations of the metal-poor ($<0.1$ ${\mathrm{Z}}_{\odot }$) Type II supernova 2023ufx and its host galaxy. The deep nebular spectrum, obtained roughly a year after explos…