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physical object > natural object > celestial body > star > variable > periodic variable > Cepheid

Cepheid comparison table

Subject	has spectral type	is part of	has author	has period	has absolute magnitude	occur in	is a kind of	has synonym	has definition
dwarf Cepheid	A star to F star			1 to 3 hours			Cepheid	ultrashort-period Cepheid	A group of pulsating variable stars with small variations in amplitude. They lie in the lower part of the Cepheid instability strip.
Population I Cepheid	F star, G star and K star	disk	Baade (1944)	5-10 days	<Mv> = -0.5 to -6		Population I star	young disk Cepheid	A Cepheid which is about 4 times more luminous than Population II Cepheids, probably because of their higher metal content (although mass may also be a factor).
Population II Cepheid	F star, G star and K star	halo	Baade (1944)	10 to 30 days	<Mv> = 0 to -3	globular clusters	Population II star	W Virginis star	A bright yellow star that pulsates like a Cepheid but is older and fainter.

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