Meaning of cluster variable | Babel Free

Definitions

1. an RR Lyrae variable; a type of variable star commonly (but not exclusively) found in globular clusters
2. A variable whose values are used to classify data points into clusters; a variable that identifies one of the defining properties of clusters.

Examples

“This period, which is exceptionally long for a cluster variable, satisfies the observations fairly well except in a few cases.”

“It is a good example of a cluster variable having a large range of variations, a short period, and extremely rapid increase⟳ and decrease in light⟳.”

“Nearly all of the variable stars found in the other globular clusters had the same characteristics as those found in Omega Centauri. It was five years before a cluster variable was found outside of a globular cluster.”

“There are some thirty classical Cepheids, and a few irregular variables, in the globular clusters among the stars brighter than the typical cluster variable.”

“The first model⟳ includes the potential cluster variable conditioned on clustering variables already selected, while in the second model⟳ the variable is not included.”

CEFR level