Population II Cepheid Comparison Table

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Population II Cepheid comparison table

Subject has spectral type is part of has optical brightness variation has observational problem has author has prototype has period has absolute magnitude occur in is a kind of has name designated with has observable variation time scale has synonym has definition

Cepheid F star, G star and K star 0.2 magnitudes or greater some difficulty in distinguishing between various kinds delta Cephei 1 to 50 days periodic variable
R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
V 335, V 336, etc., when the double letter designations are exhausted
within a period of decades Strictly periodic variables with periods 1-50 days, of spectral types F, G and K.

Population II star halo Baade (1944) star halo star Older stars, generally formed towards the centre of a galaxy, containing few heavier elements. The brightest of this Population are red giants.

Population II Cepheid F star, G star and K star halo 0.2 magnitudes or greater some difficulty in distinguishing between various kinds Baade (1944) delta Cephei 10 to 30 days <M_v> = 0 to -3 globular clusters Population II star
R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
V 335, V 336, etc., when the double letter designations are exhausted
within a period of decades W Virginis star A bright yellow star that pulsates like a Cepheid but is older and fainter.

Subject	has spectral type	is part of	has optical brightness variation	has observational problem	has author	has prototype	has period	has absolute magnitude	occur in	is a kind of	has name designated with	has observable variation time scale	has synonym	has definition
Cepheid	F star, G star and K star		0.2 magnitudes or greater	some difficulty in distinguishing between various kinds		delta Cephei	1 to 50 days			periodic variable	R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted	within a period of decades		Strictly periodic variables with periods 1-50 days, of spectral types F, G and K.
Population II star		halo			Baade (1944)					star			halo star	Older stars, generally formed towards the centre of a galaxy, containing few heavier elements. The brightest of this Population are red giants.
Population II Cepheid	F star, G star and K star	halo	0.2 magnitudes or greater	some difficulty in distinguishing between various kinds	Baade (1944)	delta Cephei	10 to 30 days	<M_v> = 0 to -3	globular clusters	Population II star	R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted	within a period of decades	W Virginis star	A bright yellow star that pulsates like a Cepheid but is older and fainter.

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