https://www.academia.edu/70985020/Ceti_a_probable_Apstar_descendant_entering_the_Hertzsprung_gap
Feb 9, 2022 - Context. 14 Ceti is a subgiant star of F spectral class that displays variations in the S-index of its Ca iiH & K lines and an X-ray emission that is stronger...
hertzsprung gappdfcetiprobableapstar
https://www.golden-forum.com/viewtopic.php?t=41594&view=next
hdserviceapstar