Blue straggler stars
type: Concept
contributor: AAS Frey.Katie
modified: 2020-10-26T19:15:39.851Z
modified: 2020-10-26T19:15:28.36Z
alternative label: Blue-straggler stars
alternative label: Blue stragglers
broader: Stellar evolutionary types
definition: Any of stars, often found in globular clusters and old open clusters, that lie on the blueward extension of the main sequence beyond the turnoff point. Blue stragglers have an anomalously blue color and high luminosity in comparison with other cluster members. The most probable ways in which they could form are: mass transfer or coalescence in close binary systems, encounters or collisions in overcrowded cores of globular clusters.
related: Yellow straggler stars

Yellow straggler stars
type: Concept
related: Blue straggler stars

Stellar evolutionary types
type: Concept
narrower: Blue straggler stars