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 • X - Quasars & Black Holes |
| Distance: | z=2.4 (redshift) |
Colours & filters
| Band | Telescope |
| Ultraviolet | Very Large Telescope UVES |
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