Evolution of globular clusters

This video shows the movement of blue straggler stars in globular clusters over time. Blue straggler stars are blue, bright stars, with a higher mass than the average for a cluster, and they are expected to sink towards the centre of a star cluster over time. Those closest to the cluster core are the first to migrate inwards, with more distant blue stragglers progressively moving inwards over time.

A new study using the NASA/ESA Hubble Space Telescope and the MPG/ESO 2.2-metre telescope has shown that not all globular clusters evolve at the same rate. While all globular clusters are old (over 10 billion years), the stellar distribution within some remains youthful, with the blue straggler stars spread throughout the cluster. Others have aged prematurely, with the stars all located in the centre.

Të drejtat:

ESO/NASA/ESA, L. Calçada, F. Ferraro (University of Bologna)

Rreth kësaj Videoje

Id:eso1252a
Data e Publikimit:Dhj 19, 2012, 19:00 CET
Publikime të ngjashme:eso1252
Kohëzgjatja:30 s
Frame rate:30 fps

Rreth objektit

Emri:NGC 6388
Tipi:Milky Way : Star : Grouping : Cluster : Globular
Kategori:Star Clusters

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