Average spectra of the blue and red population stars

Average spectra of the blue and red stellar populations in the globular cluster Omega Centauri. Each spectrum represents an average of spectra of 17 individual stars and a total of 204 hours of exposure time with the FLAMES instrument on the Very Large Telescope. The spectral lines of some elements are indicated. Differences between the two spectra are easily noticeable; a detailed analysis shows that the "blue" spectra correspond to a greater content of heavier elements than the "red" spectra. (VLT KUEYEN and FLAMES)

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ESO

Om bilden

ID:eso0509c
Typ:Diagram
Publiceringsdatum:15 mars 2005
Relaterade pressmeddelanden:eso0509
Storlek:2747 x 946 px

Om objektet

Namn:Omega Centauri
Typ:Milky Way : Star : Grouping : Cluster : Globular
Avstånd:17000 ljusår
Kategori:Star Clusters

Bildformat

Originalstorlek
406,7 kB
Stor jpeg
379,5 kB
Skärmstor jpeg
100,5 kB

Färger och filter

BandVåglängdTeleskop
Synligt ljus
V
442 nmVery Large Telescope
FLAMES

Exposure time: 734400s