RR Lyrae star
Two subgroups are recognized: RRAB, which pulsate in the fundamental mode, and RRC, which pulsate in the first overtone. Type RRAB shows an asymmetric light curve, with a steep rise and a more gradual decline, while type RRC varies roughly sinusoidally and with an amplitude of less than 0.8 magnitude. The presence of scatter and large amplitude variations in the light curves are often the signature of double-mode pulsation and the Blazhko effect in some of these variables.
Related entry• variable stars
Related categories• TYPES OF STARS
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