Evolution of 47 Tuc stellar populations
This illustration shows the evolution of two populations of stars in the ancient globular cluster 47 Tucanae.
The first panel shows a grouping of red stars, an older population containing fewer chemical elements heavier than helium and hydrogen. These stars move in random, circular orbits. As the most massive of these stars die, they return chemically enhanced material back into the cluster. This material helps to form another generation of stars, shown as the blue stars in the second panel. The blue stars are more chemically enriched and are concentrated towards the cluster's centre, traveling in elliptical orbits. Slowly, over time, the blue stars have been moving outward, putting them on more radial orbits, as seen in the third panel.
- NASA Press release
- Hubble finds evidence of multiple stellar populations in globular cluster 47 Tucanae
- Hubble image of globular cluster 47 Tucanae
NASA, ESA, and A. Feild (STScI)
About the Image
|Release date:||19 July 2013, 12:44|
|Size:||2400 x 900 px|
About the Object
|Name:||47 Tuc, 47 Tucanae, NGC 104|
|Type:||Milky Way : Star : Grouping : Cluster : Globular|
|Distance:||17000 light years|