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.

Crédito:

ESO

Sobre la imagen

Identificador:eso0013b
Tipo:Mapa
Fecha de publicación:6 de Abril de 2000
Noticias relacionadas:eso0013
Tamaño:800 x 602 px

Sobre el objeto

Nombre:G271-162
Tipo:Milky Way : Star
Categoría:Stars

Formatos de imagen

JPEG grande
58,3 KB

Colores y filtros

BandaTelescopio
Óptico
R
Very Large Telescope
UVES