Centre de Données astronomiques de Strasbourg

Difference: RrlyrDef (1 vs. 2)

Revision 22014-04-10 - CecileLoup

 			 META TOPICPARENT 
			 name="ObjectDescription"
- META TOPICPARENT
+ name="ObjectDescription"
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<
+Status : Stars on the Horizontal Branch of initial mass about 0.5 Mo. They are burning Helium in the core and Hydrogen in a layer. They belong to population II.
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+RR Lyrae are pulsating variable stars on the Horizontal Branch in the instability strip. Their initial mass is about 0.5 Mo,  and they belong to population II. Their spectral type are A-F  III. Their periods range from 0.2 to 1.2 days, and amplitudes from 0.2 to 2 mag in V. Corresponding types in the GCVS are : RR, RR(B), RRAB, RRC.
-<
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+Spectral type : A-F with luminosity type III.
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>
-<
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+Variability : Pulsating variables with periods from 0.2 to 1.2 days and amplitudes between 0.2 and 2 mag in V. Corresponding types in the GCVS : RR, RR(B), RRAB, RRC.
 -- CecileLoup - 2014-04-08

Revision 12014-04-08 - CecileLoup

META TOPICPARENT	name="ObjectDescription"

Status : Stars on the Horizontal Branch of initial mass about 0.5 Mo. They are burning Helium in the core and Hydrogen in a layer. They belong to population II.

Spectral type : A-F with luminosity type III.

Variability : Pulsating variables with periods from 0.2 to 1.2 days and amplitudes between 0.2 and 2 mag in V. Corresponding types in the GCVS : RR, RR(B), RRAB, RRC.

-- CecileLoup - 2014-04-08

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