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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
Over de afbeelding
| Id: | eso9944e |
| Type: | Kaart |
| Publicatiedatum: | 5 oktober 1999 |
| Gerelateerde berichten: | eso9944 |
| Grootte: | 3003 x 1540 px |
Over het object
| Naam: | QSO HE2217-2818, Spectrum |
| Type: | Early Universe : Galaxy : Activity : AGN : Quasar |
| Afstand: | z=2.4 (roodverschuiving) |
| Categorie: | Quasars and Black Holes |
Kleuren & filters
| Band | Telescoop |
|---|---|
| Ultraviolet | Very Large Telescope UVES |