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)

Crédit:

ESO

À propos de l'image

Identification:eso0509c
Type:Graphique
Date de publication:15 mars 2005
Communiqués de presse en rapport:eso0509
Taille:2747 x 946 px

À propos de l'objet

Nom:Omega Centauri
Type:Milky Way : Star : Grouping : Cluster : Globular
Distance:17000 années lumière
Catégorie:Star Clusters

Image Formats

Grand JPEG
379,5 Kio
JPEG taille écran
100,5 Kio

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Visible
V
442 nmVery Large Telescope
FLAMES

Exposure time: 734400s