Lyman-alpha forest in QSO HE2217-2818
A tracing of one spectral order, corresponding to one horizontal line in the echelle spectrum. It shows part of the Lyman-alpha forest in the ultraviolet spectrum of the southern quasar QSO HE2217-2818 . The absorption lines are caused by intervening, neutral hydrogen gas located at different distances along the line-of-sight towards this quasar.
Credit:ESO
About the Image
Id: | eso9944e |
Type: | Chart |
Release date: | 5 October 1999 |
Related releases: | eso9944 |
Size: | 3003 x 1540 px |
About the Object
Name: | QSO HE2217-2818, Spectrum |
Type: | Early Universe : Galaxy : Activity : AGN : Quasar |
Distance: | z=2.4 (redshift) |
Category: | Quasars and Black Holes |
Colours & filters
Band | Telescope |
---|---|
Ultraviolet | Very Large Telescope UVES |