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.

Bildnachweis:

ESO

Über das Bild

ID:eso0013b
Typ:Aufsuchkarte
Veröffentlichungsdatum:6. April 2000
Dazugehörige Veröffentlichungen:eso0013
Größe:800 x 602 px

Über das Objekt

Name:G271-162
Typ:Milky Way : Star
Kategorie:Stars

Bildformate

Großes JPEG
58,3 KB

Farben & Filter

SpektralbereichTeleskop
Optisch
R
Very Large Telescope
UVES