Lithium in a metal-poor Halo Star

This image shows a spectrum of the metal-poor star G271-162 in the red spectral region around the Li-line at 671 nm that is used to derive the lithium isotopic ratio. The wavelengths of the doublet components of the two isotopes are indicated. The total exposure time was 3 hours and the S/N-ratio in the continuum region is above 600 - a most satisfactory result considering that the CCD fringing amplitude is more than 20% at these wavelengths.

Crédit:

ESO

À propos de l'image

Identification:eso0013b
Type:Graphique
Date de publication:6 avril 2000
Communiqués de presse en rapport:eso0013
Taille:800 x 602 px

À propos de l'objet

Nom:G271-162
Type:Milky Way : Star
Catégorie:Stars

Formats des images

Grand JPEG
58,3 Kio

Couleurs & filtres

DomaineTélescope
Visible
R
Very Large Telescope
UVES