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.

Källa:

ESO

Om bilden

ID:eso0013b
Typ:Diagram
Publiceringsdatum:6 april 2000
Relaterade pressmeddelanden:eso0013
Storlek:800 x 602 px

Om objektet

Namn:G271-162
Typ:Milky Way : Star
Kategori:Stars

Bildformat

Originalstorlek
49,7 kB
Stor jpeg
58,3 kB
Skärmstor jpeg
75,1 kB

Färger och filter

BandTeleskop
Synligt ljus
R
Very Large Telescope
UVES