F Stars

F stars are hot stars characterized by the presence of strong CaII H and K lines, hydrogen, Na, and other metals in the optical spectra.
F2V F5V

F6V F7V

F8V F9V

F0IV

F6IV F6IV

F0III F6III
F5II
F2Ia F2Ib?

F5Ia F5Ib

FIab cepheid