blue straggler star


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blue straggler star

[¦blü ′strag·lər ‚stär]
(astronomy)
A member of a star cluster that lies above the turnoff point of the cluster's Hertzsprung-Russell diagram, and lies near the main sequence.
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References in periodicals archive ?
A team of astronomers used Hubble to study the blue straggler star content in Messier 30, which formed 13 billion years ago and was discovered in 1764 by Charles Messier.
To better understand cluster ageing, the team mapped the location of blue straggler stars in 21 globular clusters, as seen in images from Hubble and the MPG/ESO 2.
Analysing the observational data, the team found that a few clusters appeared young, with blue straggler stars distributed throughout, while a larger group appeared old, with the blue stragglers clumped in the centre.