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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All of this points to "stellar cannibalism" as the primary mechanism for blue straggler formation.
That model leads to a definite prediction: If a blue straggler arises from a group process, it should have a distant companion.
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.
That means if a given blue straggler formed with the rest of its star cluster, it should have died billions of years ago," Knigge said.
org, match astronomers' ideas about what would be left if a blue straggler took gas from a now-defunct companion star.
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.
The extent of the blue straggler population detected provides two new constraints for models of the star-formation history of the bulge.
Christopher Frohmaier was nominated for his project Blue Straggler Stars in the Globular Cluster M30 , which investigated the nature of these unique and enigmatic variety of stars that appear to defy the normal stellar ageing process.
The star either dipped into the Fountain of Youth by becoming a blue straggler, or it was flung out of the Large Magellanic Cloud, a neighboring galaxy.
Indeed, the high stellar densities in their cores boost the formation of exotic populations like Blue Stragglers (BSs) which seem to be present in essentially all GCs.
It contains a large variety of stars, from highly evolved red giants to white dwarfs and blue stragglers.
WASHINGTON, May 25, 2011 /PRNewswire-USNewswire/ -- NASA's Hubble Space Telescope has found a rare class of oddball stars called blue stragglers in the hub of our Milky Way, the first detected within our galaxy's bulge.