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.

Credit:

ESO

About the Image

Id:eso0013b
Type:Chart
Release date:6 April 2000
Related releases:eso0013
Size:800 x 602 px

About the Object

Name:G271-162
Type:• Milky Way : Star
• X - Stars

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Colours & filters

BandTelescope
Optical
R
Very Large Telescope
UVES

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